$ git clone -n https://src.fedoraproject.org/rpms/python-sybil.git /var/lib/mock/f40-build-2204447-51961/root/chroot_tmpdir/scmroot/python-sybil
Cloning into '/var/lib/mock/f40-build-2204447-51961/root/chroot_tmpdir/scmroot/python-sybil'...
$ git fetch origin 18a7aec30612a3c4d53c927a3ffffc9e4ffe8945:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sybil
 * [new ref]         18a7aec30612a3c4d53c927a3ffffc9e4ffe8945 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18a7aec Update to 5.0.3 (rhbz#2156205)