diff --git a/contrib/mercurial_git_push.py b/contrib/mercurial_git_push.py
index 6abe212..acd20c4 100755
--- a/contrib/mercurial_git_push.py
+++ b/contrib/mercurial_git_push.py
@@ -1232,6 +1232,9 @@ class GitRevision(BaseRevision):
     """Class to represent information of changeset."""
     @staticmethod
     def fetch(node, base, refs=None, skipKnown=True):
+        if node == '0000000000000000000000000000000000000000':
+            return []
+
         if base == '0000000000000000000000000000000000000000':
             rev = node
         else: