diff -r 5eee6f4f3d0d -r e7587430ca23 hgext/git/gitlog.py
--- a/hgext/git/gitlog.py	Fri Sep 18 16:26:37 2020 -0700
+++ b/hgext/git/gitlog.py	Mon Sep 21 10:23:25 2020 -0400
@@ -389,7 +389,7 @@
         sig = pygit2.Signature(
             encoding.unifromlocal(stringutil.person(user)),
             encoding.unifromlocal(stringutil.email(user)),
-            timestamp,
+            int(timestamp),
             -int(tz // 60),
         )
         oid = self.gitrepo.create_commit(