$ git clone -n https://gitee.com/opencloudos-stream/llvm.git /var/lib/mock/dist-ocs23-base-build-295649-28705/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-ocs23-base-build-295649-28705/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/llvm
 * [new ref]         HEAD       -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09a8743 Rebuilt for clarifying the packages requirement in BaseOS and AppStream