$ git clone -n https://src.fedoraproject.org/rpms/CubicSDR.git /var/lib/mock/f41-build-side-1-2817874-32992/root/chroot_tmpdir/scmroot/CubicSDR
Cloning into '/var/lib/mock/f41-build-side-1-2817874-32992/root/chroot_tmpdir/scmroot/CubicSDR'...
$ git fetch origin eb92e61155b9024db8a668e2ab514ee8c379711f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/CubicSDR
 * [new ref]         eb92e61155b9024db8a668e2ab514ee8c379711f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb92e61 Exclude i686 as liquid-dsp is.