--- a/mercurial/hook.py	Thu Mar 03 17:39:20 2022 -0800
+++ b/mercurial/hook.py	Thu Mar 03 18:28:30 2022 -0800
@@ -166,7 +166,7 @@
     else:
         env[b'HGPLAIN'] = b''
 
-    for k, v in pycompat.iteritems(args):
+    for k, v in args.items():
         # transaction changes can accumulate MBs of data, so skip it
         # for external hooks
         if k == b'changes':