$ git clone -n https://src.fedoraproject.org/rpms/buildstream.git /var/lib/mock/f41-build-1465505-23647/root/chroot_tmpdir/scmroot/buildstream
Cloning into '/var/lib/mock/f41-build-1465505-23647/root/chroot_tmpdir/scmroot/buildstream'...
$ git fetch origin 53c63710e1a7d5641d9bf91bddd3118aa59db482:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buildstream
 * [new ref]         53c63710e1a7d5641d9bf91bddd3118aa59db482 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53c6371 Orphaned for 6+ weeks