From the “Pull changes” menu item inside the "Project Settings," defaults or placeholders for the individual input fields of the “Pull changes” dialogue can be set.
We ship the feature with the following defaults:
With these settings, your users will find their “Pull changes” form with an empty commit message and pull request description, and a pull request title defaulting to the name of your Scratch Org and Sandbox Feature.
By leveraging the “use as Placeholder only” checkbox in combination with a set of variables that we provide, a typical configuration could make the form appear, for example, like this:
