Windows Insiders wanting to jump ahead and test the next version of Windows 10 can now select the Skip Ahead option. The Skip Ahead option gives you builds from the next release of Windows 10, which in this case will be 19H2 while the Fast ring will get 19H1 builds ready for the April release.
Microsoft open up the Skip Ahead ring until they have enough testers signed up and then they will close off the branch. Over the next few weeks we may get our first 19H2 build while Microsoft finish off the 19H1 development. It keeps us Windows Insiders on our toes testing out two versions of Windows 10.