Here is some information on Branching
By Vincent Driessen https://nvie.com/posts/a-successful-git-branching-model/
NOP commerce Instructions:
Production branch: master
Development branch: develop
Feature and issue branches: Should start with "feature" or "issue". It should be followed by issue ID (according to our Github issue list) and some friendly name (example, "multistore"). Finally, it should look like "feature-34-multistore" or "issue-35-paypal-redirection-bug"
Release branches: Should start with "release". It should be followed by version number (example, "3.00"). Finally, it should look like "release-3.00"
NOP 3.9 since Base release.