$ git clone -n https://src.fedoraproject.org/rpms/ocaml-res.git /var/lib/mock/f38-build-side-42-init-devel-637461-26384/root/chroot_tmpdir/scmroot/ocaml-res
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-637461-26384/root/chroot_tmpdir/scmroot/ocaml-res'...
$ git fetch origin 8651e3100dd460780453d7cbbb73fb7fc38cb665:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-res
 * [new ref]         8651e3100dd460780453d7cbbb73fb7fc38cb665 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8651e31 Rebuild OCaml packages for F38