How do I specify the build number when deploying an iOS application (not version number)

I'm looking for a way to specify the application's build number when deploying an iOS application.

Currently in the -app.xml file, you can specify a version number by using:

<versionNumber>1.0.24</versionNumber>

But when submitting to the iTunes Connect store, I want to be able to submit the new updates as a build change, and not version change to avoid the approval process again.

Can this be done ?

Thanks in advance.

-Daniel