$ git clone -n https://gitee.com/opencloudos-stream/iperf3.git /home/lib/mock/dist-ocs23-build-235760-20634/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/home/lib/mock/dist-ocs23-build-235760-20634/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/iperf3
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbb9d7c Rebuilt for loongarch release