Architecture specific change in rpms/kiwi.git

The package rpms/kiwi.git has added or updated architecture specific content in its
spec file (ExclusiveArch/ExcludeArch or %ifarch/%ifnarch) in commit(s):
https://src.fedoraproject.org/cgit/rpms/kiwi.git/commit/?id=ac8dba3e3c0cf1ea....

Change:
+%ifnarch ppc64

Thanks.

Full change:
============

commit ac8dba3e3c0cf1ead3b7c3d9b2a59a5e492c4b58
Author: Neal Gompa 
Date:   Sun Mar 31 19:07:48 2019 -0400

Do not require buildah on ppc64

diff --git a/kiwi.spec b/kiwi.spec
index 69e768a..e9220e7 100644
--- a/kiwi.spec
+++ b/kiwi.spec
@@ -78,7 +78,6 @@ Requires:       zypper
 Provides:       kiwi-packagemanager:zypper
 %endif
 # Common tool dependencies
-Requires:       buildah
 Requires:       device-mapper-multipath
 Requires:       dosfstools
 Requires:       e2fsprogs
@@ -98,6 +97,10 @@ Requires:       tar >= 1.2.7
 Recommends:     debootstrap
 Recommends:     jing
 %endif
+%ifnarch ppc64
+# buildah isn't available on ppc64
+Requires:       buildah
+%endif
 %ifarch %{arm} aarch64
 Requires:       uboot-tools
 %endif