https://wccftech.com/macos-10-14-1-mojave-beta-released-for-developers/

If you are a registered developer then you can go right ahead and download the beta 1 of macOS 10.14.1 Mojave.

While Apple just got done releasing iOS 12, macOS Mojave, tvOS 12 and watchOS 5 to users around the globe with supported devices, but don’t think for a second that the company has closed its software shop just yet. A while back it came to light that Apple has seeded iOS 12.1, watchOS 5.1 and tvOS 12.1 to registered developers and now macOS Mojave is joining the party with the release of 10.14.1.