$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-nautytracesinterface.git /var/lib/mock/f40-build-797077-141057/root/chroot_tmpdir/scmroot/gap-pkg-nautytracesinterface
Cloning into '/var/lib/mock/f40-build-797077-141057/root/chroot_tmpdir/scmroot/gap-pkg-nautytracesinterface'...
$ git fetch origin 51ab7deb8868eb7c2713137a558914306315957b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-nautytracesinterface
 * [new ref]         51ab7deb8868eb7c2713137a558914306315957b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51ab7de Rebuild for nauty 2.8.8