libseccomp is now a dependency of systemd. When one installs a container tree based on Fedora this means libseccomp and all of its depndencies are pulled in. This includes the dependency "kernel >= 3.5", which means a kernel is pulled into the container tree which however really isn't needed there.
The dependency should probably be simply dropped, or turned into a "Conflicts: kernel < 3.5" or so (though i see very little point in that, the libray should fail cleanly anyway, right?), so that we can set up containers without pulling in kernel.rpm again.
$ rpm -qa libseccomp
$ rpm -q --requires libseccomp
kernel >= 3.5 ←←←←←←
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1
*** This bug has been marked as a duplicate of bug 1065572 ***