TEMPLATES_REF applies to updates

templates.py

@@ -98,7 +98,7 @@ def update(args: argparse.Namespace) -> None:
         sys.exit("no .copier/*.yml here")
     for file in answers:
         run_update(".", answers_file=str(file), unsafe=True, overwrite=True,
-                   skip_answered=not args.ask, defaults=args.defaults)
+                   skip_answered=not args.ask, defaults=args.defaults, vcs_ref=REF)
 
 
 def main() -> None: