$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23.2-build-400058-72361/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.2-build-400058-72361/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin d52adc303f21f8d45472135974a6a98f80fdd23b:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         d52adc303f21f8d45472135974a6a98f80fdd23b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d52adc3 LoongArch: Backport patches from upstream