$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-natefinch-lumberjack-2.git /var/lib/mock/f45-build-12667-443/root/chroot_tmpdir/scmroot/golang-gopkg-natefinch-lumberjack-2
Cloning into '/var/lib/mock/f45-build-12667-443/root/chroot_tmpdir/scmroot/golang-gopkg-natefinch-lumberjack-2'...
$ git fetch origin 2309b287016fbde8629cafcf83309771de624283:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-natefinch-lumberjack-2
 * [new ref]         2309b287016fbde8629cafcf83309771de624283 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2309b28 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild