$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mdx.git /var/lib/mock/f45-build-20596-572/root/chroot_tmpdir/scmroot/ocaml-mdx
Cloning into '/var/lib/mock/f45-build-20596-572/root/chroot_tmpdir/scmroot/ocaml-mdx'...
$ git fetch origin 567c5fe52b35dc697f9a1fafa292497673527afe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mdx
 * [new ref]         567c5fe52b35dc697f9a1fafa292497673527afe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 567c5fe Version 2.7.0