If I select the default branch (e.g., main) in CodePipeline but set the trigger filter to stage-*, which branch will the pipeline deploy—main or a stage-* branch?

Here, I'm using a code pipeline for the staging environment. Once the development environment is completed, a dynamic branch is created. The staging pipeline needs to use this dynamically created branch from development. When setting up the staging pipeline, I need to specify a default branch. However, at this point, the dynamic branch hasn't been created yet. So, I set the default branch to 'main' but configured the trigger to filter for branches following the 'stage-*'. My question is: which branch will the pipeline use for deployment – the default branch ('main') or the dynamically created 'stage-' branch?