$ git clone -n https://src.fedoraproject.org/rpms/mozo.git /var/lib/mock/f40-build-1284927-23240/root/chroot_tmpdir/scmroot/mozo
Cloning into '/var/lib/mock/f40-build-1284927-23240/root/chroot_tmpdir/scmroot/mozo'...
$ git fetch origin 1f4e68231c3d07eee9252cce612475ae9a9ffcc5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mozo
 * [new ref]         1f4e68231c3d07eee9252cce612475ae9a9ffcc5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f4e682 update to 1.28.0