$ git clone -n https://gitee.com/llvm-la/clang.git /var/lib/mock/dist-an23.2-build-401433-72376/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.2-build-401433-72376/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin f0647043ba7a4d8dd34a83142d8488eb92b42f49:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/clang
 * [new ref]         f0647043ba7a4d8dd34a83142d8488eb92b42f49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f064704 [Feature] Backport some patches from upstream on LoongArch