$ git clone -n https://src.fedoraproject.org/rpms/ocaml-luv.git /var/lib/mock/f41-build-849398-164777/root/chroot_tmpdir/scmroot/ocaml-luv
Cloning into '/var/lib/mock/f41-build-849398-164777/root/chroot_tmpdir/scmroot/ocaml-luv'...
$ git fetch origin ecffc69c42b7f7f204910ae7d188ab6e7fb7005c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-luv
 * [new ref]         ecffc69c42b7f7f204910ae7d188ab6e7fb7005c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ecffc69 Rebuild for ocaml-ctypes 0.23.0