Remember, the Holga allows you to shoot multiple times and advance as little as you like. Merely take a shot, wind a little bit less than a full frame, and take another shot, thereby causing the images to overlap and creating a psuedo-panoramic image.
You could actually expose the entire film like this creating a super-long continuous image. You'll probably need a negative scanner to produce the final images, as most labs can't print a huge negative.
Panoramic Look Photos