Architecture specific change in rpms/rust-id_tree.git

The package rpms/rust-id_tree.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/rust-id_tree.git/commit/?id=c2316253....

Change:
+ExclusiveArch:  %{rust_arches}

Thanks.

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

commit c23162539af04b7d61447dbe762270af0249619a
Author: Igor Gnatenko 
Date:   Fri Jul 27 00:26:07 2018 +0200

initial import

Signed-off-by: Igor Gnatenko

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..74caafe
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/id_tree-1.3.0.crate
diff --git a/rust-id_tree.spec b/rust-id_tree.spec
new file mode 100644
index 0000000..f023cb8
--- /dev/null
+++ b/rust-id_tree.spec
@@ -0,0 +1,58 @@
+# Generated by rust2rpm
+%bcond_without check
+%global debug_package %{nil}
+
+%global crate id_tree
+
+Name:           rust-%{crate}
+Version:        1.3.0
+Release:        1%{?dist}
+Summary:        Library for creating and modifying Tree structures
+
+License:        MIT
+URL:            https://crates.io/crates/id_tree
+Source0:        https://crates.io/api/v1/crates/%%7Bcrate%7D/%%7Bversion%7D/download#/%%7Bcr...
+
+ExclusiveArch:  %{rust_arches}
+
+BuildRequires:  rust-packaging
+# [dependencies]
+BuildRequires:  (crate(snowflake) >= 1.3.0 with crate(snowflake) < 2.0.0)
+
+%description
+%{summary}.
+
+%package        devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description    devel
+A library for creating and modifying Tree structures.
+
+This package contains library source intended for building other packages
+which use %{crate} from crates.io.
+
+%prep
+%autosetup -n %{crate}-%{version} -p1
+%cargo_prep
+
+%build
+%cargo_build
+
+%install
+%cargo_install
+
+%if %{with check}
+%check
+%cargo_test
+%endif
+
+%files          devel
+%license LICENSE
+%doc README.md
+%{cargo_registry}/%{crate}-%{version}/
+%exclude %{cargo_registry}/%{crate}-%{version}/appveyor.yml
+
+%changelog
+* Wed Jul 25 2018 Igor Gnatenko  - 1.3.0-1
+- Initial package
diff --git a/sources b/sources
new file mode 100644
index 0000000..33f53d6
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (id_tree-1.3.0.crate) = f210fbe99f4ad3643a13b6e552b444643658132dd7eb638b3dd3f9921d01352b1b3b65df0ce2fb976a6f3943f661aab8ee77af1ca31ef7e769cab55d6e4d24fc