$ git clone -n https://src.fedoraproject.org/rpms/zix.git /var/lib/mock/f45-build-39368-734/root/chroot_tmpdir/scmroot/zix
Cloning into '/var/lib/mock/f45-build-39368-734/root/chroot_tmpdir/scmroot/zix'...
$ git fetch origin f22864f7da720ba6a34cfc8b2be8c2301ae1ae84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zix
 * [new ref]         f22864f7da720ba6a34cfc8b2be8c2301ae1ae84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f22864f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild