$ git clone -n https://src.fedoraproject.org/rpms/gqrx.git /var/lib/mock/f42-build-3401446-45130/root/chroot_tmpdir/scmroot/gqrx
Cloning into '/var/lib/mock/f42-build-3401446-45130/root/chroot_tmpdir/scmroot/gqrx'...
$ git fetch origin 802950203ae161529e51a13f7663960d3564b592:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gqrx
 * [new ref]         802950203ae161529e51a13f7663960d3564b592 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8029502 Rebuilt for new volk