$ git clone -n https://gitee.com/opencloudos-stream/clang.git /var/lib/mock/dist-ocs23-base-build-294025-28490/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-ocs23-base-build-294025-28490/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/clang
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4eb2b29 Rebuilt for clarifying the packages requirement in BaseOS and AppStream