$ git clone -n https://src.fedoraproject.org/rpms/golang-github-tonistiigi-archvariant.git /var/lib/mock/f45-build-20254-569/root/chroot_tmpdir/scmroot/golang-github-tonistiigi-archvariant
Cloning into '/var/lib/mock/f45-build-20254-569/root/chroot_tmpdir/scmroot/golang-github-tonistiigi-archvariant'...
$ git fetch origin 41d5750e93aeb8f37f6991272b2fbedcfa6d9494:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-tonistiigi-archvariant
 * [new ref]         41d5750e93aeb8f37f6991272b2fbedcfa6d9494 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41d5750 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild