$ git clone -n https://src.fedoraproject.org/rpms/golang-github-gorhill-cronexpr.git /var/lib/mock/f45-build-20124-568/root/chroot_tmpdir/scmroot/golang-github-gorhill-cronexpr
Cloning into '/var/lib/mock/f45-build-20124-568/root/chroot_tmpdir/scmroot/golang-github-gorhill-cronexpr'...
$ git fetch origin 0a3de810fe2c55994ccf1dae63f1f3f063575a32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-gorhill-cronexpr
 * [new ref]         0a3de810fe2c55994ccf1dae63f1f3f063575a32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a3de81 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild