Remove hard-coded master branch reference

[bluesliverx]

Description

Switches the branch used to pull the latest changes to the current HEAD's branch.

Related Issue

Motivation and Context

We have some newer projects that use "main" as the default branch instead of "master", due to reasons. master is currently hard-coded in pydc-control for some things, and we wanted to remove that to be more dynamic.

How Has This Been Tested?

I tested this manually against our code bases.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.