$ git clone -n https://git.cclinux.org/stage/rpms/iperf3.git /mnt/compose/mock/dist-circle8_10-updates-build-117287-79162/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/mnt/compose/mock/dist-circle8_10-updates-build-117287-79162/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin 2a4b664b6792028f1728b9346e261a10e2cd2b15:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/iperf3
 * [new ref]         2a4b664b6792028f1728b9346e261a10e2cd2b15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a4b664 import iperf3-3.5-10.el8_10