From ed6800d613d99997ea7d5dc0b660c0a99920f623 Mon Sep 17 00:00:00 2001
From: Tomas Kopecek <tkopecek@redhat.com>
Date: Jun 01 2017 07:39:24 +0000
Subject: bytes in rpm headers


---

diff --git a/koji/__init__.py b/koji/__init__.py
index 6eb8093..f4dde34 100644
--- a/koji/__init__.py
+++ b/koji/__init__.py
@@ -915,8 +915,12 @@ def get_header_field(hdr, name, src_arch=False):
             result = []
         elif isinstance(result, six.integer_types):
             result = [result]
-    if isinstance(result, bytes):
-        result = result.decode('utf-8')
+    if six.PY3 and isinstance(result, bytes):
+        try:
+            result = result.decode('utf-8')
+        except UnicodeDecodeError:
+            # typically signatures
+            pass
     return result