Preserve original copyright holders

Author: bbhtt

git_evtag_py.py

@@ -2,6 +2,8 @@
 
 # SPDX-License-Identifier: LGPL-2.0-or-later
 # Original: https://github.com/cgwalters/git-evtag/blob/main/src/git-evtag-compute-py
+# Copyright (C) 2025 bbhtt <[email protected]>
+# Copyright (C) 2015 Colin Walters <[email protected]>
 
 import argparse
 import hashlib