$ git clone -n https://src.fedoraproject.org/rpms/zork.git /var/lib/mock/f45-build-39380-734/root/chroot_tmpdir/scmroot/zork
Cloning into '/var/lib/mock/f45-build-39380-734/root/chroot_tmpdir/scmroot/zork'...
$ git fetch origin f306d7cefaec204a1b21f2a8d41a036ee3633ba8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zork
 * [new ref]         f306d7cefaec204a1b21f2a8d41a036ee3633ba8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f306d7c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild