$ git clone -n https://gitee.com/wenyuzifang/rrdtool.git /var/lib/mock/dist-an23-build-470209-74061/root/chroot_tmpdir/scmroot/rrdtool
Cloning into '/var/lib/mock/dist-an23-build-470209-74061/root/chroot_tmpdir/scmroot/rrdtool'...
$ git fetch origin 633791641e25e425d0bb5eaf0ce589dd874dbf29:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/rrdtool
 * [new ref]         633791641e25e425d0bb5eaf0ce589dd874dbf29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6337916 Update code from upstream