$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23-build-305592-66638/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-305592-66638/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin ed4fa9bdef91db0ce64be9c379c184fe601b108a:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         ed4fa9bdef91db0ce64be9c379c184fe601b108a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed4fa9b [LoongArch] Backport patches and add the triple for anolis os