ci: backport fix for `osx-*` 6h timeouts#5225

dscho wants to merge 2 commits intogit-for-windows:maingit-for-windows/git:mainfrom

gitgitgadget:jk/fsmonitor-event-listener-race-fixgitgitgadget/git:jk/fsmonitor-event-listener-race-fixCopy head branch name to clipboard