$ git clone -n https://gitee.com/llvm-la/llvm.git /var/lib/mock/dist-an23-build-443415-73188/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-443415-73188/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 3cc9c69b14de7d2766b656cbe4fd69486e9d420d:KOJI_FETCH_HEAD
From https://gitee.com/llvm-la/llvm
 * [new ref]         3cc9c69b14de7d2766b656cbe4fd69486e9d420d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cc9c69 [Bugfix] Backport patches from upstream on LoongArch