I'm trying to create a mirror for ~agd5f/linux on repo.or.cz, which fails with
the following error:

Initiated mirroring of git://people.freedesktop.org/~agd5f/linux to repo.or.cz
project agd5f-linux.git:

Project: agd5f-linux

Mirroring from URL "git://people.freedesktop.org/~agd5f/linux"

Initiating mirroring...
Fetching origin
error: object 17f7e29bd0870fd0f43ba1acde3c6c1b65aee734: badTimezone: invalid
author/committer line - bad time zone
fatal: Error in object
fatal: index-pack failed
error: Could not fetch origin