diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -4909,9 +4909,7 @@
     with ui.configoverride(overrides, b'merge'):
         force = opts.get(b'force')
         labels = [b'working copy', b'merge rev']
-        return hg.merge(
-            repo, node, force=force, labels=labels
-        )
+        return hg.merge(repo, node, force=force, labels=labels)
 
 
 statemod.addunfinished(
diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -1141,14 +1141,7 @@
 ):
     """Branch merge with node, resolving changes. Return true if any
     unresolved conflicts."""
-    stats = mergemod.update(
-        repo,
-        node,
-        branchmerge=True,
-        force=force,
-        mergeforce=force,
-        labels=labels,
-    )
+    stats = mergemod.merge(repo[node], force=force, labels=labels,)
     _showstats(repo, stats)
     if stats.unresolvedcount:
         repo.ui.status(
diff --git a/mercurial/merge.py b/mercurial/merge.py
--- a/mercurial/merge.py
+++ b/mercurial/merge.py
@@ -2597,6 +2597,23 @@
     return stats
 
 
+def merge(ctx, labels=None, force=False, wc=None):
+    """Merge another topological branch into the working copy.
+
+    force = whether the merge was run with 'merge --force' (deprecated)
+    """
+
+    return update(
+        ctx.repo(),
+        ctx.rev(),
+        labels=labels,
+        branchmerge=True,
+        force=force,
+        mergeforce=force,
+        wc=wc,
+    )
+
+
 def clean_update(ctx, wc=None):
     """Do a clean update to the given commit.