diff --git a/rspec-related-create-full-tarball.sh b/rspec-related-create-full-tarball.sh
index c0ba6bf..a847c6c 100644
--- a/rspec-related-create-full-tarball.sh
+++ b/rspec-related-create-full-tarball.sh
@@ -14,9 +14,10 @@ CURRDIR=$(pwd)
 TMPDIRPATH=$(mktemp -d /var/tmp/rspec-tar-XXXXXX)
 pushd $TMPDIRPATH
 
-git clone https://github.com/rspec/rspec.git
-pushd rspec
-git reset --hard $1-v$2
+git clone https://github.com/rspec/$1.git
+pushd $1
+git reset --hard v$2
+popd
 
 ln -sf $1 $1-$2
 tar czf ${CURRDIR}/rubygem-$1-$2-full.tar.gz $1-$2/./
diff --git a/rubygem-rspec-support-3.13.3-diff_spec-format-revert.patch b/rubygem-rspec-support-3.13.3-diff_spec-format-revert.patch
deleted file mode 100644
index 31260cf..0000000
--- a/rubygem-rspec-support-3.13.3-diff_spec-format-revert.patch
+++ /dev/null
@@ -1,20 +0,0 @@
---- rspec-support-3.13.3/spec/rspec/support/differ_spec.rb.orig	2025-05-15 11:05:59.000000000 +0900
-+++ rspec-support-3.13.3/spec/rspec/support/differ_spec.rb	2025-05-15 11:36:03.054513436 +0900
-@@ -200,7 +200,7 @@ module RSpec
- 
-           expected_diff = dedent(<<-"EOD")
-             |
--            |@@ #{one_line_header(5)} @@
-+            |@@ -1,5 +1,5 @@
-             | <Animal
-             |   name=bob,
-             |-  species=tortoise
-@@ -427,7 +427,7 @@ module RSpec
- 
-           expected_diff = dedent(<<-"EOD")
-             |
--            |@@ #{one_line_header(3)} @@
-+            |@@ -1,3 +1,3 @@
-             | this is:
-             |-  another string
-             |+  one string
diff --git a/rubygem-rspec-support.spec b/rubygem-rspec-support.spec
index f41bd15..b1125ab 100644
--- a/rubygem-rspec-support.spec
+++ b/rubygem-rspec-support.spec
@@ -1,9 +1,9 @@
 %global	gem_name	rspec-support
 
-%global	mainver	3.13.6
+%global	mainver	3.12.1
 %undefine	prever
 
-%global	baserelease	1
+%global	baserelease	2
 %global	prerpmver	%(echo "%{?prever}" | sed -e 's|\\.||g')
 
 %bcond_with bootstrap
@@ -17,14 +17,12 @@ Release:	%{?prever:0.}%{baserelease}%{?prever:.%{prerpmver}}%{?dist}
 Summary:	Common functionality to Rspec series
 # SPDX confirmed
 License:	MIT
-URL:		https://rspec.info
+URL:		https://github.com/rspec/rspec-support
 Source0:	https://rubygems.org/gems/%{gem_name}-%{mainver}%{?prever}.gem
 # %%{SOURCE2} %%{name} %%{version}
 Source1:	rubygem-%{gem_name}-%{version}-full.tar.gz
 Source2:	rspec-related-create-full-tarball.sh
-# Workaround tests wrt diff/lcs diff format
-# Partially revert 3.13.2 -> 3.13.3 change
-Patch0:	rubygem-rspec-support-3.13.3-diff_spec-format-revert.patch
+# tweak regex for search path
 Patch100:	rubygem-rspec-support-3.2.1-callerfilter-searchpath-regex.patch
 
 #BuildRequires:	ruby(release)
@@ -61,7 +59,6 @@ Documentation for %{name}
 %setup -q -T -n %{gem_name}-%{version} -b 1
 gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
 
-%patch -P0 -p1
 %patch -P100 -p1
 
 %build
@@ -110,45 +107,6 @@ rspec spec/ || rspec --tag ~broken
 %doc	%{gem_docdir}
 
 %changelog
-* Wed Sep 17 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.6-1
-- 3.13.6
-
-* Tue Aug 19 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.5-1
-- 3.13.5
-
-* Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.13.4-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
-
-* Thu May 29 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.4-1
-- 3.13.4
-
-* Thu May 15 2025 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.3-1
-- 3.13.3
-
-* Sat Jan 18 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.13.2-3
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
-
-* Sun Dec 29 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.2-2
-- Backport upstream fix to support ruby34 Hash inspect syntax
-
-* Thu Dec 05 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.2-1
-- 3.13.2
-
-* Wed Nov 06 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.1-3
-- Backport upstream fix for ruby34
-
-* Fri Jul 19 2024 Fedora Release Engineering <releng@fedoraproject.org> - 3.13.1-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild
-
-* Sun Feb 25 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.1-1
-- 3.13.1
-
-* Fri Feb 09 2024 Mamoru TASAKA <mtasaka@fedoraproject.org> - 3.13.0-1
-- 3.13.0
-
-* Fri Jan 26 2024 Fedora Release Engineering <releng@fedoraproject.org> - 3.12.1-3
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
-
 * Fri Jul 21 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.12.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild
 
diff --git a/sources b/sources
index 3852c20..ed9c422 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (rubygem-rspec-support-3.13.6-full.tar.gz) = 09387dd39649d47bc3b859251e428808e06b1d2e6bc13d38f2b2da9241e1c937c71992f4b042053729d64af535fd6a6931d73b6d4f454c35eceae037839fa77d
-SHA512 (rspec-support-3.13.6.gem) = 7a07e6233e59da5bf9b1347de3e56330b02906cec8d05d619b1ff5f802f98cdf1194e63c01f4a3f5ac0bc68b59794edeaf4dc91cab37b563d57be82543e7df12
+SHA512 (rspec-support-3.12.1.gem) = 4fe1428d898d5eda81c91276fc05cc3d21320f104a593c8285a051bd7c61c0ded16a9f4da3c75d9e14190169d49d28fc6ad901b525d3b69bb8c6483035d6f83b
+SHA512 (rubygem-rspec-support-3.12.1-full.tar.gz) = 15e2f339f52601f7319f063519a544640147e9e6312f0a30b36cafa1a934568992fd354701c0f79459d0a10df77d70c7ed92a729636afd5518de75a0b5cbb18b