$ git clone -n https://gitee.com/opencloudos-stream/llvm.git /var/lib/mock/dist-ocs23-build-168227-10395/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-ocs23-build-168227-10395/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/llvm
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba0d3fe !5 [Backport][LoongArch] Support `relax`, vector, some improvements and bugfixs Merge pull request !5 from Ami-zhang/master