$ git clone -n https://src.fedoraproject.org/rpms/z3.git /var/lib/mock/f41-build-814647-149004/root/chroot_tmpdir/scmroot/z3
Cloning into '/var/lib/mock/f41-build-814647-149004/root/chroot_tmpdir/scmroot/z3'...
$ git fetch origin bed9a8e94c432e749debbbccdad20c94a1349dd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/z3
 * [new ref]         bed9a8e94c432e749debbbccdad20c94a1349dd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bed9a8e OCaml 5.2.0 ppc64le fix