$ git clone -n https://gitee.com/tomcruiseqi/protobuf.git /var/lib/mock/dist-an23-build-461782-73780/root/chroot_tmpdir/scmroot/protobuf
Cloning into '/var/lib/mock/dist-an23-build-461782-73780/root/chroot_tmpdir/scmroot/protobuf'...
$ git fetch origin 5e2f38ad219d89dbec38d11efc9ebdededdb9970:KOJI_FETCH_HEAD
From https://gitee.com/tomcruiseqi/protobuf
 * [new ref]         5e2f38ad219d89dbec38d11efc9ebdededdb9970 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e2f38a Update to 31.1