$ git clone -n http://git.inferitos.ru/rpms/iperf3 /var/lib/mock/inferit-8_8-build-el8_8-29052-49241/root/chroot_tmpdir/scmroot/iperf3
Cloning into '/var/lib/mock/inferit-8_8-build-el8_8-29052-49241/root/chroot_tmpdir/scmroot/iperf3'...
$ git fetch origin changed/i8c/iperf3-3.5-7.el8_8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/iperf3
 * [new tag]         changed/i8c/iperf3-3.5-7.el8_8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fce20b9 import iperf3-3.5-7.el8_8