--- a/mercurial/destutil.py	Fri Jun 03 15:55:07 2016 +0200
+++ b/mercurial/destutil.py	Tue Apr 05 07:30:01 2016 +0200
@@ -95,6 +95,10 @@
     wc = repo[None]
     movemark = node = None
     currentbranch = wc.branch()
+
+    if clean:
+        currentbranch = repo['.'].branch()
+
     if currentbranch in repo.branchmap():
         heads = repo.branchheads(currentbranch)
         if heads: