$ git clone -n https://src.fedoraproject.org/rpms/python-spur.git /var/lib/mock/f39-build-1426496-31599/root/chroot_tmpdir/scmroot/python-spur
Cloning into '/var/lib/mock/f39-build-1426496-31599/root/chroot_tmpdir/scmroot/python-spur'...
$ git fetch origin 3550c22f88ecd0e9a49c85df456832741df877ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-spur
 * [new ref]         3550c22f88ecd0e9a49c85df456832741df877ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3550c22 Add patch