diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -630,9 +630,6 @@
     if u2:
         repo.ui.debug(b"%s:\n   %s\n" % (header % b'other', b"\n   ".join(u2)))
 
-    fullcopy = copies1.copy()
-    fullcopy.update(copies2)
-
     if repo.ui.debugflag:
         renamedeleteset = set()
         divergeset = set()
@@ -647,17 +644,21 @@
             b"  all copies found (* = to merge, ! = divergent, "
             b"% = renamed and deleted):\n"
         )
-        for f in sorted(fullcopy):
-            note = b""
-            if f in copy1 or f in copy2:
-                note += b"*"
-            if f in divergeset:
-                note += b"!"
-            if f in renamedeleteset:
-                note += b"%"
-            repo.ui.debug(
-                b"   src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note)
-            )
+        for side, copies in (("local", copies1), ("remote", copies2)):
+            if not copies:
+                continue
+            repo.ui.debug(b"   on %s side:\n" % side)
+            for f in sorted(copies):
+                note = b""
+                if f in copy1 or f in copy2:
+                    note += b"*"
+                if f in divergeset:
+                    note += b"!"
+                if f in renamedeleteset:
+                    note += b"%"
+                repo.ui.debug(
+                    b"    src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note)
+                )
         del renamedeleteset
         del divergeset
 
diff --git a/tests/test-copy-move-merge.t b/tests/test-copy-move-merge.t
--- a/tests/test-copy-move-merge.t
+++ b/tests/test-copy-move-merge.t
@@ -27,8 +27,9 @@
      b
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
-     src: 'a' -> dst: 'c' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
+      src: 'a' -> dst: 'c' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
diff --git a/tests/test-double-merge.t b/tests/test-double-merge.t
--- a/tests/test-double-merge.t
+++ b/tests/test-double-merge.t
@@ -29,7 +29,8 @@
     unmatched files in other:
      bar
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'foo' -> dst: 'bar' *
+     on remote side:
+      src: 'foo' -> dst: 'bar' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
diff --git a/tests/test-graft.t b/tests/test-graft.t
--- a/tests/test-graft.t
+++ b/tests/test-graft.t
@@ -204,7 +204,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
@@ -223,7 +224,8 @@
   updating the branch cache
   grafting 5:97f8bfe72746 "5"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'c' -> dst: 'b' 
+     on local side:
+      src: 'c' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
@@ -239,7 +241,8 @@
   scanning for duplicate grafts
   grafting 4:9c233e8e184d "4"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'c' -> dst: 'b' 
+     on local side:
+      src: 'c' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
@@ -746,7 +749,10 @@
   scanning for duplicate grafts
   grafting 13:7a4785234d87 "2"
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: True, partial: False
diff --git a/tests/test-issue672.t b/tests/test-issue672.t
--- a/tests/test-issue672.t
+++ b/tests/test-issue672.t
@@ -28,7 +28,8 @@
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: '1' -> dst: '1a' 
+     on remote side:
+      src: '1' -> dst: '1a' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -56,7 +57,8 @@
     unmatched files in local:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: '1' -> dst: '1a' *
+     on local side:
+      src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -78,7 +80,8 @@
     unmatched files in other:
      1a
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: '1' -> dst: '1a' *
+     on remote side:
+      src: '1' -> dst: '1a' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
diff --git a/tests/test-merge-criss-cross.t b/tests/test-merge-criss-cross.t
--- a/tests/test-merge-criss-cross.t
+++ b/tests/test-merge-criss-cross.t
@@ -419,7 +419,8 @@
     unmatched files in other:
      d2/b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'd1/b' -> dst: 'd2/b' 
+     on remote side:
+      src: 'd1/b' -> dst: 'd2/b' 
     checking for directory renames
      discovered dir src: 'd1/' -> dst: 'd2/'
   resolving manifests
diff --git a/tests/test-rename-dir-merge.t b/tests/test-rename-dir-merge.t
--- a/tests/test-rename-dir-merge.t
+++ b/tests/test-rename-dir-merge.t
@@ -30,8 +30,9 @@
      b/a
      b/b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a/a' -> dst: 'b/a' 
-     src: 'a/b' -> dst: 'b/b' 
+     on remote side:
+      src: 'a/a' -> dst: 'b/a' 
+      src: 'a/b' -> dst: 'b/b' 
     checking for directory renames
      discovered dir src: 'a/' -> dst: 'b/'
      pending file src: 'a/c' -> dst: 'b/c'
@@ -75,8 +76,9 @@
     unmatched files in other:
      a/c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a/a' -> dst: 'b/a' 
-     src: 'a/b' -> dst: 'b/b' 
+     on local side:
+      src: 'a/a' -> dst: 'b/a' 
+      src: 'a/b' -> dst: 'b/b' 
     checking for directory renames
      discovered dir src: 'a/' -> dst: 'b/'
      pending file src: 'a/c' -> dst: 'b/c'
diff --git a/tests/test-rename-merge1.t b/tests/test-rename-merge1.t
--- a/tests/test-rename-merge1.t
+++ b/tests/test-rename-merge1.t
@@ -28,9 +28,11 @@
      b
      b2
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
-     src: 'a2' -> dst: 'b2' !
-     src: 'a2' -> dst: 'c2' !
+     on local side:
+      src: 'a2' -> dst: 'c2' !
+     on remote side:
+      src: 'a' -> dst: 'b' *
+      src: 'a2' -> dst: 'b2' !
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -170,7 +172,8 @@
     unmatched files in other:
      newfile
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'file' -> dst: 'newfile' %
+     on remote side:
+      src: 'file' -> dst: 'newfile' %
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -206,7 +209,10 @@
 # we should not get the prompts about modify/delete conflicts
   $ hg merge --debug 1 -t :merge3
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'x' -> dst: 'z' 
+     on local side:
+      src: 'y' -> dst: 'z' 
+     on remote side:
+      src: 'x' -> dst: 'z' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
diff --git a/tests/test-rename-merge2.t b/tests/test-rename-merge2.t
--- a/tests/test-rename-merge2.t
+++ b/tests/test-rename-merge2.t
@@ -79,7 +79,8 @@
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -117,7 +118,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -156,7 +158,8 @@
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -194,7 +197,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -231,7 +235,8 @@
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -263,7 +268,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -294,7 +300,8 @@
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -327,7 +334,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -355,7 +363,10 @@
   test L:um a b R:um a b W:       - 9  do merge with ancestor in a
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -400,8 +411,10 @@
     unmatched files in other:
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' !
-     src: 'a' -> dst: 'c' !
+     on local side:
+      src: 'a' -> dst: 'b' !
+     on remote side:
+      src: 'a' -> dst: 'c' !
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -434,7 +447,8 @@
   test L:nc a b R:up b   W:       - 12 merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -473,7 +487,8 @@
   test L:up b   R:nm a b W:       - 13 merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -513,7 +528,8 @@
   test L:nc a b R:up a b W:       - 14 merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -553,7 +569,8 @@
   test L:up b   R:nm a b W:       - 15 merge b no ancestor, remove a
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -593,7 +610,8 @@
   test L:nc a b R:up a b W:       - 16 get a, merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -633,7 +651,8 @@
   test L:up a b R:nc a b W:       - 17 keep a, merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -672,7 +691,8 @@
   test L:nm a b R:up a b W:       - 18 merge b no ancestor
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on local side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -717,7 +737,8 @@
   test L:up a b R:nm a b W:       - 19 merge b no ancestor, prompt remove a
   --------------
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' 
+     on remote side:
+      src: 'a' -> dst: 'b' 
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -765,7 +786,8 @@
     unmatched files in other:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on remote side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -807,7 +829,8 @@
     unmatched files in local:
      b
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -853,7 +876,8 @@
     unmatched files in other:
      c
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: 'a' -> dst: 'b' *
+     on local side:
+      src: 'a' -> dst: 'b' *
     checking for directory renames
   resolving manifests
    branchmerge: True, force: False, partial: False
@@ -936,11 +960,14 @@
      4/g
      7/f
     all copies found (* = to merge, ! = divergent, % = renamed and deleted):
-     src: '1/f' -> dst: '1/g' *
-     src: '3/f' -> dst: '3/g' *
-     src: '4/f' -> dst: '4/g' *
-     src: '5/f' -> dst: '5/g' *
-     src: '6/f' -> dst: '6/g' *
+     on local side:
+      src: '1/f' -> dst: '1/g' *
+      src: '5/f' -> dst: '5/g' *
+      src: '6/f' -> dst: '6/g' *
+     on remote side:
+      src: '1/f' -> dst: '1/g' *
+      src: '3/f' -> dst: '3/g' *
+      src: '4/f' -> dst: '4/g' *
     checking for directory renames
   $ hg mani
   0/f