$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23.2-build-401166-72376/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.2-build-401166-72376/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin cb0bae63993625a722e785653b98c06d14d5928e:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         cb0bae63993625a722e785653b98c06d14d5928e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb0bae6 [Feature] Backport some patches from upstream on LoongArch