--- commit.py.orig	2015-06-12 19:23:24.011526090 -0400
+++ commit.py	2015-06-12 19:24:22.731711427 -0400
@@ -871,7 +871,8 @@
     if b is None:
         b = master
     mgr = SavedCommitMessagesManager(None, b)
-    revid_iterator = b.repository.iter_reverse_revision_history(old_revid)
+    graph = b.repository.get_graph()
+    revid_iterator = graph.iter_lefthand_qancestry(old_revid)
     cur_revno = old_revno
     new_revision_id = old_revid
     graph = b.repository.get_graph()