$ git clone -n https://gitee.com/src-opencloudos-rpms/ocaml.git /var/lib/mock/dist-oc9-build-49046-14595/root/chroot_tmpdir/scmroot/ocaml
Cloning into '/var/lib/mock/dist-oc9-build-49046-14595/root/chroot_tmpdir/scmroot/ocaml'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/ocaml
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ae269c import ocaml-4.13.1-4.tl4