make fetch-ocsp-response use Python 3

nghttp2.spec

@@ -1,7 +1,7 @@
 Summary: Experimental HTTP/2 client, server and proxy
 Name: nghttp2
 Version: 1.31.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: MIT
 Group: Applications/Internet
 URL: https://nghttp2.org/
@@ -45,6 +45,8 @@ for building applications with libnghttp2.
 %prep
 %setup -q
 
+# make fetch-ocsp-response use Python 3
+sed -e '1 s|^#!/.*python|&3|' -i script/fetch-ocsp-response
 
 %build
 %configure                                  \
@@ -112,6 +114,9 @@ make %{?_smp_mflags} check
 
 
 %changelog
+* Thu Mar 15 2018 Kamil Dudka <kdudka@redhat.com> 1.31.0-2
+- make fetch-ocsp-response use Python 3
+
 * Tue Feb 27 2018 Kamil Dudka <kdudka@redhat.com> 1.31.0-1
 - update to the latest upstream release