Architecture specific change in rpms/gpaw.git

The package rpms/gpaw.git has added or updated architecture specific content in its
spec file (ExclusiveArch/ExcludeArch or %ifarch/%ifnarch) in commit(s):
http://pkgs.fedoraproject.org/cgit/rpms/gpaw.git/commit/?id=98b28e8c5ef76a3b...
http://pkgs.fedoraproject.org/cgit/rpms/gpaw.git/commit/?id=273c776f99431c89....

Change:
+%ifnarch ppc64
+%ifarch s390x

Thanks.