$ git clone -n https://gitee.com/zhoujiajia111/protobuf_2.git /var/lib/mock/dist-an23-build-493947-74562/root/chroot_tmpdir/scmroot/protobuf_2
Cloning into '/var/lib/mock/dist-an23-build-493947-74562/root/chroot_tmpdir/scmroot/protobuf_2'...
$ git fetch origin 33c7927f6508e840cc457c4d59d34c28f75ede42:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/protobuf_2
 * [new ref]         33c7927f6508e840cc457c4d59d34c28f75ede42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33c7927 downgrade to 25.1