$ git clone -n https://gitee.com/opencloudos-stream/ocaml-dune.git /var/lib/mock/dist-ocs23-build-264290-25404/root/chroot_tmpdir/scmroot/ocaml-dune
Cloning into '/var/lib/mock/dist-ocs23-build-264290-25404/root/chroot_tmpdir/scmroot/ocaml-dune'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ocaml-dune
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cac03de !3 drop python3-sphinx-copybutton build requirement which is in EPOL Merge pull request !3 from cunshunxia/master