$ git clone -n https://src.fedoraproject.org/rpms/ocaml-merlin.git /var/lib/mock/f40-build-783971-133234/root/chroot_tmpdir/scmroot/ocaml-merlin
Cloning into '/var/lib/mock/f40-build-783971-133234/root/chroot_tmpdir/scmroot/ocaml-merlin'...
$ git fetch origin 1276def0d064694d70978ad1ecc75b257abaa651:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-merlin
 * [new ref]         1276def0d064694d70978ad1ecc75b257abaa651 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1276def Version 4.14