$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mew.git /var/lib/mock/f38-build-side-42-init-devel-695018-26980/root/chroot_tmpdir/scmroot/ocaml-mew
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-695018-26980/root/chroot_tmpdir/scmroot/ocaml-mew'...
$ git fetch origin 5a9f41c192f8436ab87f9f7329a489c530df945d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mew
 * [new ref]         5a9f41c192f8436ab87f9f7329a489c530df945d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a9f41c Rebuild OCaml packages for F38