$ git clone -n https://gitee.com/wenyuzifang/rrdtool.git /var/lib/mock/dist-an23-build-472744-74118/root/chroot_tmpdir/scmroot/rrdtool
Cloning into '/var/lib/mock/dist-an23-build-472744-74118/root/chroot_tmpdir/scmroot/rrdtool'...
$ git fetch origin 2ebdfeb237df9bb85c489884b79ac407d153dee8:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/rrdtool
 * [new ref]         2ebdfeb237df9bb85c489884b79ac407d153dee8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ebdfeb Update code from upstream