git clean [optional path]
    delete untracked and ignored files

    -h
        help for the clean commands
    -n, --dry-run
        for safe preview
    -d
        for delete directories
    -f, --force
        to force deletion
    -x
        delete files even if they are in .gitignore
    -X
        remove ignored files only
    -e, --exclude <pattern>
        exclude pattern

    -ndx
        combine options
    
tip:
    remove the end slash at .gitignore ad end the dirs with /-only (instead of /*)