$ git clone -n https://gitee.com/src-anolis-os/llvm.git /var/lib/mock/dist-an23.1-devel-build-363293-71233/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23.1-devel-build-363293-71233/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/llvm
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7400a68 update to 17.0.6