$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23-build-322804-68385/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-322804-68385/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin a97740d995e7fbb88fa6626cfabfc087d4cb1474:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         a97740d995e7fbb88fa6626cfabfc087d4cb1474 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a97740d [LoongArch] Backport patches and add the triple for anolis os