Test upgrading the FCV constants before branching. Please reference: WRITING-8774 Changes to "Guide to Updating FCV Constants" for non-Major Releases for more details.

Note: If this is not completed before tagging the master branch, the build will become very red.

Immediately after branching 6.3, tag the first new commit in master with 7.0.0-alpha by using the following command:

 mr git tag-release --commit <hash> --version 7.0.0-alpha