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/udisks.git/tree/udisks.spec#n151 You can fix it by replacing it with %{_sysconfdir}/bash_completion.d/%{name}
You may also be interested in reading https://bugzilla.redhat.com/show_bug.cgi?id=1303441#c1