$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bep-clocks.git /var/lib/mock/f45-build-11766-434/root/chroot_tmpdir/scmroot/golang-github-bep-clocks
Cloning into '/var/lib/mock/f45-build-11766-434/root/chroot_tmpdir/scmroot/golang-github-bep-clocks'...
$ git fetch origin f47b294498296947c9046d473fe42d0e16afec9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-bep-clocks
 * [new ref]         f47b294498296947c9046d473fe42d0e16afec9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f47b294 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild