Mark Lodato [off-list ref] writes:
2. git-status globs only match untracked files, not staged or unmodified
I am reasonably sure that this is related to a n issue we discussed on
"git add" vs "git add -u" recently.
In short, you cannot expect glob style pathspecs to work for an operation
that involves running diff internally. You can guess that "To be
committed" is computed by internally running "diff --cached".
Currently globbing style pathspec are supported as an added bonus to only
some commands (e.g. "grep", "ls-files", "add" but not "add -u"). You can
also guess that "Untracked" is computed by internally running "ls-files".
In the meantime, limit yourself to leading path style pathspecs.