$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23.2-build-401217-72376/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.2-build-401217-72376/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin 5df07335c0c2832a6efbb69f802961cce59b9f79:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         5df07335c0c2832a6efbb69f802961cce59b9f79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5df0733 [Feature] Backport some patches from upstream on LoongArch