$ git clone -n https://gitee.com/mgb01105731/iperf3_1.git /var/lib/mock/dist-an23.2-build-410914-72746/root/chroot_tmpdir/scmroot/iperf3_1
Cloning into '/var/lib/mock/dist-an23.2-build-410914-72746/root/chroot_tmpdir/scmroot/iperf3_1'...
$ git fetch origin a23.2:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/iperf3_1
 * [new branch]      a23.2      -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2b86aa update to 3.18