Index: trunk/scripts/git-migration/git-migrate
===================================================================
--- trunk/scripts/git-migration/git-migrate	(revision 1893)
+++ trunk/scripts/git-migration/git-migrate	(revision 1894)
@@ -119,4 +119,10 @@
                      '--all'],
                     cwd='%s.git' % new_pkg)
+    
+    subprocess.call(['git', 'branch',
+                     '-D',
+                     old_pkg],
+                    cwd='%s.git' % new_pkg)
+    shutil.rmtree('%s.git/refs/original' % new_pkg, True)
 
 def mergeHistories():
@@ -131,4 +137,7 @@
     for merge in merges:
         mergeHistory(*merge)
+    
+    for merge in merges:
+        shutil.rmtree('%s.git' % merge[0])
 
 if __name__ == '__main__':