$ git clone -n https://gitee.com/tomcruiseqi/protobuf.git /var/lib/mock/dist-an23-build-462038-73793/root/chroot_tmpdir/scmroot/protobuf
Cloning into '/var/lib/mock/dist-an23-build-462038-73793/root/chroot_tmpdir/scmroot/protobuf'...
$ git fetch origin e3850c8ec4a916563fb30467edba0c4b9d85572e:KOJI_FETCH_HEAD
From https://gitee.com/tomcruiseqi/protobuf
 * [new ref]         e3850c8ec4a916563fb30467edba0c4b9d85572e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3850c8 Update to 31.1