$ git clone -n https://src.fedoraproject.org/rpms/gqrx.git /var/lib/mock/f40-build-758903-120090/root/chroot_tmpdir/scmroot/gqrx
Cloning into '/var/lib/mock/f40-build-758903-120090/root/chroot_tmpdir/scmroot/gqrx'...
$ git fetch origin 77b93695b1c1585786629ed415430d57337684b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gqrx
 * [new ref]         77b93695b1c1585786629ed415430d57337684b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77b9369 New version