$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cucumber-messages.git /var/lib/mock/f45-build-11846-435/root/chroot_tmpdir/scmroot/golang-github-cucumber-messages
Cloning into '/var/lib/mock/f45-build-11846-435/root/chroot_tmpdir/scmroot/golang-github-cucumber-messages'...
$ git fetch origin 70999a864615a5f14f54084bb577f9697a9740d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cucumber-messages
 * [new ref]         70999a864615a5f14f54084bb577f9697a9740d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70999a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild