Is there a way to tell git-status to ignore the effects of .gitignore files?

This option --ignored does the trick:

git status --ignored

(Update 1) I found the --ignored option alone doesn't work in certain git installations, perhaps it's a git bug. In those cases, an additional -s works for me:

git status -s --ignored

(Update 2) One user reported --ignored option is not supported in git version 1.7.0.4. My git version is 1.7.6. Another version 1.7.5.1 is the one that requires -s. You may try

git status -h

to see if --ignored is supported.

Try using git ls-files --other - it should list all files that git doesn't know about; i.e. those files that aren't in the repository and aren't ignored by .gitignore.

You can also use git ls-files --ignored --exclude-standard to see what files git is explicitly ignoring.

git clean -dXn

See: Git command to show which specific files are ignored by .gitignore

In fact this question seems to be a duplicate!