Customise the accounts-facebook form?

Im using the accounts-facebook package. Id like to add some markup and change the text slightly. Is it possible to overwrite some of the markup?

Perhaps I could copy the module out of node_modules and into my source control and overwrite it that way, but this isnt great as then I wont get updates to the package.

Do I need to roll my own form? Its only a few markup changes that I need so I was hoping to avoid this.