$ git clone -n https://gitee.com/opencloudos-stream/clang.git /var/lib/mock/dist-ocs23-build-7687-37/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-ocs23-build-7687-37/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/clang
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d08433a update