Fullscreen eingestellt.

.venv/Lib/site-packages/pip/_internal/vcs/git.py

@@ -4,6 +4,7 @@ import pathlib
 import re
 import urllib.parse
 import urllib.request
+from dataclasses import replace
 from typing import List, Optional, Tuple
 
 from pip._internal.exceptions import BadCommand, InstallationError
@@ -217,7 +218,7 @@ class Git(VersionControl):
 
         if sha is not None:
             rev_options = rev_options.make_new(sha)
-            rev_options.branch_name = rev if is_branch else None
+            rev_options = replace(rev_options, branch_name=(rev if is_branch else None))
 
             return rev_options