git: cloning a branch with German Umlauts in it's name fails due to encoding problems

[reuther-verifysoft]

Versions

• Buildbot version: 3.11.1
• Twisted version: 23.10.0
• Python version: 3.11.8

Setup

• No special configuration changes in buildbot.tac
• Master is running on macOS, Clients are running on macOS. Linux, Windows 11
• Using git repository
• Branch name is 'feature/Fehlende_Rückkehr_in_Datei' (mind the umlaut)

Problem

1. Builds for branch 'feature/Fehlende_Rückkehr_in_Datei' are startet via GitPoller / SingleBranchScheduler.
2. git checkouts (and whole builds) succeed for Linux and macOS Workers
3. git checkout fails for Windows 11 worker
4. Other branch names (no Umlauts or similiar) succeed on Windows also

Log message in twisted.log on Windows worker suggests an encoding problem:

2024-03-25 10:58:56+0100 [Broker,client] (command ['git', 'clone', '--branch', 'Fehlende_Header-Rückkehr_in_Datei', 'http://builduser@FS01:3000/foo/bar.git', '.', '--progress']):   using PTY: False
2024-03-25 10:58:57+0100 [-] (command ['git', 'clone', '--branch', 'feature/Fehlende_Rückkehr_in_Datei', 'http://builduser@FS01:3000/foo/bar.git', '.', '--progress']): command finished with signal None, exit code 128, elapsedTime: 0.829536
2024-03-25 10:58:57+0100 [-] (command 138): ProtocolCommandBase.command_complete (success) <buildbot_worker.commands.shell.WorkerShellCommand object at 0x0000017D058028F0>