--- a/hgext/convert/git.py	Wed Aug 27 12:30:28 2014 +0200
+++ b/hgext/convert/git.py	Tue Aug 26 22:03:32 2014 +0200
@@ -135,7 +135,7 @@
 
     def getfile(self, name, rev):
         if rev == hex(nullid):
-            raise IOError
+            return None, None
         if name == '.hgsub':
             data = '\n'.join([m.hgsub() for m in self.submoditer()])
             mode = ''