$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23-build-297201-65824/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-297201-65824/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin d4cd26052fa826426c5fb52fa8e04378aef229f1:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         d4cd26052fa826426c5fb52fa8e04378aef229f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4cd260 [LoongArch] Backport patches and add the triple for anolis os