$ git clone -n https://gitee.com/src-opencloudos-rpms/iperf3.git /var/lib/mock/dist-oc9-build-107447-67041/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/var/lib/mock/dist-oc9-build-107447-67041/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin e6aa555179375c58df116919a43932bc578cd5b5:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/iperf3
 * [new ref]         e6aa555179375c58df116919a43932bc578cd5b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6aa555 import iperf3-3.17.1-1.tl4