$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-gc-2.git /var/lib/mock/f45-build-12682-443/root/chroot_tmpdir/scmroot/golang-modernc-gc-2
Cloning into '/var/lib/mock/f45-build-12682-443/root/chroot_tmpdir/scmroot/golang-modernc-gc-2'...
$ git fetch origin 0f74f74ec96d5585f1a22be41193affcc8b0ef72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-gc-2
 * [new ref]         0f74f74ec96d5585f1a22be41193affcc8b0ef72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f74f74 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild