What branch is take to e.g. upload an app version to App Store Connect by using XCode 15.3 (Product -> Archive)?

Lets say I have two branches:
branchA and branchB

I make some changes to branchB commit the change and switch to branchA and create an archive to upload the app version.

What version is being uploaded? I assume the version of branchA since it is the current branch, right?

Thank you

I checked some resources on the internet but couldn’t find an anwser.