$ git clone -n https://src.fedoraproject.org/rpms/python-keep.git /var/lib/mock/f45-build-31306-651/root/chroot_tmpdir/scmroot/python-keep
Cloning into '/var/lib/mock/f45-build-31306-651/root/chroot_tmpdir/scmroot/python-keep'...
$ git fetch origin 83bf15247cb40e3b3290a30b837acdfd73853a8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-keep
 * [new ref]         83bf15247cb40e3b3290a30b837acdfd73853a8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83bf152 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild