$ git clone -n https://src.fedoraproject.org/rpms/golang-github-montanaflynn-stats.git /var/lib/mock/f45-build-12231-440/root/chroot_tmpdir/scmroot/golang-github-montanaflynn-stats
Cloning into '/var/lib/mock/f45-build-12231-440/root/chroot_tmpdir/scmroot/golang-github-montanaflynn-stats'...
$ git fetch origin 20fc0917916505d8475a31db7dae0a00dd192976:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-montanaflynn-stats
 * [new ref]         20fc0917916505d8475a31db7dae0a00dd192976 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20fc091 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild