$ git clone -n https://src.fedoraproject.org/rpms/cksfv.git /var/lib/mock/f45-build-3888-329/root/chroot_tmpdir/scmroot/cksfv
Cloning into '/var/lib/mock/f45-build-3888-329/root/chroot_tmpdir/scmroot/cksfv'...
$ git fetch origin 8479cf6191b3e3df6e314552d6f4e7ec693f581d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cksfv
 * [new ref]         8479cf6191b3e3df6e314552d6f4e7ec693f581d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8479cf6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild