$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23.2-build-401144-72376/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.2-build-401144-72376/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin bd3e4c43034634628a2ee02c5d3b9f2a313b15bb:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         bd3e4c43034634628a2ee02c5d3b9f2a313b15bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd3e4c4 [Feature] Backport some patches from upstream on LoongArch