Sometimes files are accidentally spilled into a Git repo.
Before the files are
git add, they are “untracked”, and will show up with
git status --porcelain
where the question marks indicate the file is untracked.
These files may be interactively removed (deleted) by:
git clean -i
When there are files spilled in multiple directories, the “filter by pattern” options lets you select files to retain. The updated display shows files to be deleted. When satisfied, select “Clean”–there’s no recovering those files trivially, so be sure of your choices.