$ git clone -n https://gitee.com/fundawang/lldb.git /var/lib/mock/dist-an23-build-294753-65752/root/chroot_tmpdir/scmroot/lldb
Cloning into '/var/lib/mock/dist-an23-build-294753-65752/root/chroot_tmpdir/scmroot/lldb'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/lldb
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a51a87 16.0.6