$book = Book::find(300);
$book->full_name = Str::random();
$book->increment('some_value');
$book->wasChanged('full_name'); //true
$book->increment('some_value', extra: ['full_name' => $book->full_name]);
or
$book->increment('some_value', extra: ['full_name' => Str::random()]);
or
$book->increment('some_value', extra: $book->getDirty());