Architecture specific change in rpms/gambit-c.git

The package rpms/gambit-c.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/gambit-c.git/commit/?id=3a529d50882c....

Change:
+%ifnarch s390x

Thanks.

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

commit 3a529d50882c752fd34355c16e02b7b57f9ac53b
Author: Michel Alexandre Salim 
Date:   Mon May 27 17:53:12 2019 -0700

Update to 4.9.3

diff --git a/gambit-c.spec b/gambit-c.spec
index 858f7cd..633e828 100644
--- a/gambit-c.spec
+++ b/gambit-c.spec
@@ -14,14 +14,14 @@
 %endif # el6

Name:           gambit-c
-Version:        4.8.9
-Release:        2%{?dist}
+Version:        4.9.3
+Release:        1%{?dist}
 Summary:        Scheme programming system

License:        ASL 2.0 or LGPLv2
 URL:            http://gambitscheme.org/
 %global _dirname gambit-v%(echo %{version} | sed -e 's/\./_/g')-devel
-Source0:        http://www.iro.umontreal.ca/~gambit/download/gambit/v4.8/source/%%7B_dirname...
+Source0:        http://www.iro.umontreal.ca/~gambit/download/gambit/v4.9/source/%%7B_dirname...
 Source1:        gambit-init.el
 Patch0:         gambc-v4_2_8-modtime.patch

@@ -29,8 +29,6 @@ BuildRequires:  gcc
 BuildRequires:  emacs
 Requires:       gcc
 Requires:       emacs-filesystem >= %{_emacs_version}
-Obsoletes:      emacs-gambit    < 4.7.7-2
-Obsoletes:      emacs-gambit-el < 4.7.7-2

%description
@@ -66,11 +64,9 @@ This package contains the Gambit-C user manual in HTML and PDF formats.

%prep
 %autosetup -n %{_dirname} -p1
+# Gambit tries to do a git update-index if a git repo is detected
+rm -rf .git

-#touch -r doc/gambit-c.info-2{,.tstamp}
-#iconv -f iso88591 -t utf8 doc/gambit-c.info-2 -o doc/gambit-c.info-2.utf8
-#touch -r doc/gambit-c.info-2{,.utf8}
-#mv doc/gambit-c.info-2{.utf8,}
 # Permission fixes
 chmod -x lib/*.{c,h}

@@ -107,7 +103,11 @@ make %{?_smp_mflags}

%check
+# tests fail on s390x:
+# https://bugzilla.redhat.com/show_bug.cgi?id=1714392
+%ifnarch s390x
 make check
+%endif

%install
@@ -155,13 +155,9 @@ cp -p %{SOURCE1} $RPM_BUILD_ROOT%{_emacs_sitestartdir}
 %{_infodir}/*

-
 %changelog
-* Thu Jan 31 2019 Fedora Release Engineering  - 4.8.9-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
-
-* Sat Aug 25 2018 Michel Alexandre Salim  - 4.8.9-1
-- Update to 4.8.9
+* Mon May 27 2019 Michel Alexandre Salim  - 4.9.3-1
+- Update to 4.9.3
 - Move license files to /usr/share/licenses

* Fri Jul 13 2018 Fedora Release Engineering  - 4.8.8-5
diff --git a/sources b/sources
index b17677d..1587c36 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gambit-v4_8_9-devel.tgz) = 7286356cd3c7ea24a6fb458cc2eb85b7b8f26fa5911f8f7ff772cb0d4f05edfdda6d486e0bda6fd2c49f7d90550fa0b6c2fba2e5089315d47a5fb7582190ba50
+SHA512 (gambit-v4_9_3-devel.tgz) = bccb820bf8bdc902cd5de2f188cdb915e8d3f811587e2fc78728ea574d785c0713366a03d05df70b10e115e80e77db666fe6304ebc64477a2d4e5e8313e9f36d