diff -r d6afa9c149c3 -r 59fa3890d40a hgext/git/index.py
--- a/hgext/git/index.py	Sun Dec 13 18:29:22 2020 -0800
+++ b/hgext/git/index.py	Tue Dec 01 21:54:46 2020 +0100
@@ -5,11 +5,14 @@
 import sqlite3
 
 from mercurial.i18n import _
+from mercurial.node import (
+    nullhex,
+    nullid,
+)
 
 from mercurial import (
     encoding,
     error,
-    node as nodemod,
     pycompat,
 )
 
@@ -278,7 +281,7 @@
     for pos, commit in enumerate(walker):
         if prog is not None:
             prog.update(pos)
-        p1 = p2 = nodemod.nullhex
+        p1 = p2 = nullhex
         if len(commit.parents) > 2:
             raise error.ProgrammingError(
                 (
@@ -315,9 +318,7 @@
                 )
             new_files = (p.delta.new_file for p in patchgen)
             files = {
-                nf.path: nf.id.hex
-                for nf in new_files
-                if nf.id.raw != nodemod.nullid
+                nf.path: nf.id.hex for nf in new_files if nf.id.raw != nullid
             }
             for p, n in files.items():
                 # We intentionally set NULLs for any file parentage