--- a/hgext/convert/git.py	Thu Apr 18 10:05:50 2013 -0500
+++ b/hgext/convert/git.py	Tue Jan 21 11:34:55 2014 -0600
@@ -297,7 +297,7 @@
 
         return bookmarks
 
-    def checkrevformat(self, revstr):
+    def checkrevformat(self, revstr, mapname='splicemap'):
         """ git revision string is a 40 byte hex """
-        self.checkhexformat(revstr)
+        self.checkhexformat(revstr, mapname)