https://docs.cloudmanager.mongodb.com/tutorial/configure-available-mongodb-version/

No real idea what is meant by Git Version, or even the format of the download expected.

Would be especially nice if it was clear how to make release candidates available using this "add custom build" functionality. Actually, would great if RCs were available as first class versions in the version management page, but I understand this might be difficult, particularly for major versions (i.e. I imagine that Cloud Manager/3.4 integration testing is still ongoing). That said, driving people to use other install methods for RCs will be problematic as Cloud Manager and Ops Manager become the preferred way to manage all environments, including test and dev.