$ git clone -n https://src.fedoraproject.org/rpms/wult.git /var/lib/mock/f42-build-3367081-45050/root/chroot_tmpdir/scmroot/wult
Cloning into '/var/lib/mock/f42-build-3367081-45050/root/chroot_tmpdir/scmroot/wult'...
$ git fetch origin 501587cb212703d5849e93cfd240d2578e1f9ac2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wult
 * [new ref]         501587cb212703d5849e93cfd240d2578e1f9ac2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 501587c version fix