diff --git a/hgext/amend.py b/hgext/amend.py
--- a/hgext/amend.py
+++ b/hgext/amend.py
@@ -16,7 +16,12 @@
 from mercurial import (
     cmdutil,
     commands,
+    error,
+    obsolete,
     registrar,
+    rewriteutil,
+    scmutil,
+    state as statemod,
 )
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
@@ -48,6 +53,12 @@
         ),
         (b's', b'secret', None, _(b'use the secret phase for committing')),
         (b'n', b'note', b'', _(b'store a note on the amend')),
+        (
+            b'r',
+            b'rev',
+            b'',
+            _(b'amend into the specified revision (EXPERIMENTAL)'),
+        ),
     ]
     + cmdutil.walkopts
     + cmdutil.commitopts
@@ -67,8 +78,69 @@
     """
     cmdutil.check_note_size(opts)
 
-    with repo.wlock(), repo.lock():
-        if not opts.get('logfile'):
-            opts['message'] = opts.get('message') or repo[b'.'].description()
-        opts['amend'] = True
-        return commands._docommit(ui, repo, *pats, **opts)
+    if opts.get('rev'):
+        return _amend_rev(ui, repo, *pats, **opts)
+    else:
+        with repo.wlock(), repo.lock():
+            if not opts.get('logfile'):
+                opts['message'] = (
+                    opts.get('message') or repo[b'.'].description()
+                )
+            opts['amend'] = True
+            return commands._docommit(ui, repo, *pats, **opts)
+
+
+def _amend_rev(ui, repo, *pats, **opts):
+    # TODO: Add support for most of these
+    cmdutil.check_incompatible_arguments(
+        opts,
+        'rev',
+        [
+            'addremove',
+            'edit',
+            'interactive',
+            'close_branch',
+            'secret',
+            'note',
+            'include',
+            'exclude',
+            'message',
+            'logfile',
+            'date',
+            'user',
+            'currentdate',
+            'currentuser',
+        ],
+    )
+
+    if not obsolete.isenabled(repo, obsolete.createmarkersopt):
+        raise error.StateError(_(b'--rev requires evolution'))
+
+    with repo.wlock(), repo.lock(), repo.transaction(b'amend'):
+        cmdutil.checkunfinished(repo)
+        target_ctx = scmutil.revsingle(repo, opts['rev'])
+        to_rewrite = repo.revs(b'%d::.', target_ctx.rev())
+        rewriteutil.precheck(repo, to_rewrite, b'amend')
+        state = statemod.cmdstate(repo, b'amend-state')
+        ret = commands._docommit(
+            ui, repo, message=b'temporary commit for "amend --rev"'
+        )
+        if ret:
+            return ret
+        temp_ctx = repo[b'tip']
+        state.save(1, {b"tmp_node": temp_ctx.node()})
+
+
+def _abort_amend_rev(ui, repo):
+    state = statemod.cmdstate(repo, b'amend-state')
+    state.delete()
+
+
+def extsetup(ui):
+    statemod.addunfinished(
+        b'amend',
+        fname=b'amend-state',
+        allowcommit=False,
+        continueflag=False,
+        abortfunc=_abort_amend_rev,
+    )
diff --git a/tests/test-amend-rev.t b/tests/test-amend-rev.t
new file mode 100644
--- /dev/null
+++ b/tests/test-amend-rev.t
@@ -0,0 +1,50 @@
+
+  $ cat << EOF >> $HGRCPATH
+  > [extensions]
+  > amend=
+  > debugdrawdag=$TESTDIR/drawdag.py
+  > [experimental]
+  > evolution.createmarkers=True
+  > EOF
+
+Some simple setup
+
+  $ hg init repo1
+  $ cd repo1
+  $ echo a > a
+  $ hg ci -Aqm A
+  $ echo b > b
+  $ hg ci -Aqm B
+
+Fails if the working copy is clean
+
+  $ hg amend -r '.^'
+  nothing changed
+  [1]
+
+Fails if evolution is not enabled
+
+  $ echo a2 > a
+  $ hg amend -r '.^' --config experimental.evolution.createmarkers=False
+  abort: --rev requires evolution
+  [20]
+
+  $ hg amend -r '.^'
+  $ hg log -G -T '{rev} {desc}'
+  @  2 temporary commit for "amend --rev"
+  |
+  o  1 B
+  |
+  o  0 A
+  
+TODO: The commit should have been amended
+  $ hg cat -r '.^' a
+  a
+  $ hg st -v
+  # The repository is in an unfinished *amend* state.
+  
+  # To continue:    hg amend --continue
+  # To abort:       hg amend --abort
+  
+  $ hg abort
+  $ hg st -v