Description of problem: The package owns /etc/bash_completion.d directory that is already owned by "filesystem" package. Problem triggered by line %{_sysconfdir}/bash_completion.d at http://pkgs.fedoraproject.org/cgit/rpms/fedpkg.git/tree/fedpkg.spec#n57 You can fix it by replacing it with %{_sysconfdir}/bash_completion.d/%{name}
http://pkgs.fedoraproject.org/cgit/rpms/fedpkg.git/commit/?id=e8ac9b8fbcf1498effc07aa6606f9da3d60a2515
confirmed fixed in fedpkg-1.21-2.fc23