$ git clone -n https://gitee.com/lxpzero/llvm.git /var/lib/mock/dist-an23.1-devel-build-363060-71223/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23.1-devel-build-363060-71223/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin llvm-16:KOJI_FETCH_HEAD
From https://gitee.com/lxpzero/llvm
 * [new branch]      llvm-16    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e8f7ce update llvm.spec.