$ git clone -n https://gitee.com/mgb01105731/protobuf_6.git /var/lib/mock/dist-an23.3-build-487620-74418/root/chroot_tmpdir/scmroot/protobuf_6
Cloning into '/var/lib/mock/dist-an23.3-build-487620-74418/root/chroot_tmpdir/scmroot/protobuf_6'...
$ git fetch origin a23.3:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/protobuf_6
 * [new branch]      a23.3      -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cf6797 downgrade to 25.1