How to upload to hub and use model later on?

I am following this basic tutorial, and I'm wondering how I save the fine tuned model and use it later on? For example, in this tutorial, we fine tune a model, but then how can I use it at a later time without having to fine tune again?
https://colab.research.google.com/github/bigscience-workshop/petals/blob/main/examples/prompt-tuning-sst2.ipynb