$ git clone -n https://gitee.com/src-opencloudos-rpms/iperf3.git /var/lib/mock/dist-oc8-build-234369-81967/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/var/lib/mock/dist-oc8-build-234369-81967/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin 653af3087c3be3129dac22f4660b4df338ec6d14:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/iperf3
 * [new ref]         653af3087c3be3129dac22f4660b4df338ec6d14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 653af30 import iperf3-3.5-12.tl3