The "descendants" command:
Usage: fossil descendants ?CHECKIN? ?OPTIONS? Find all leaf descendants of the check-in specified or if the argument is omitted, of the check-in currently checked out. Options: -R|--repository FILE Extract info from repository FILE -W|--width <num> Width of lines (default is to auto-detect). Must be >20 or 0 (= no limit, resulting in a single line per entry). See also: finfo, info, leaves