$ git clone -n https://gitee.com/opencloudos-stream/ocaml.git /var/lib/mock/dist-ocs23-build-183087-12374/root/chroot_tmpdir/scmroot/ocaml
Cloning into '/var/lib/mock/dist-ocs23-build-183087-12374/root/chroot_tmpdir/scmroot/ocaml'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ocaml
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c905e55 !7 add requires and buildrequires of ocaml-srpm-macros. Merge pull request !7 from cunshunxia/master