$ git clone -n https://gitee.com/src-opencloudos-rpms/iperf3.git /var/lib/mock/dist-oc8-build-248192-83676/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/var/lib/mock/dist-oc8-build-248192-83676/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin 03facd4747619868d1b1fba067acab58aae23dfb:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/iperf3
 * [new ref]         03facd4747619868d1b1fba067acab58aae23dfb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03facd4 import iperf3-3.5-12.tl3.1