if first[module]['tag_or_branch'] != second[module]['tag_or_branch']:
diff[module] = (first[module]['tag_or_branch'], second[module]['tag_or_branch'])
if first[module]['tag_or_branch'] != second[module]['tag_or_branch']:
diff[module] = (first[module]['tag_or_branch'], second[module]['tag_or_branch'])