A lot of developers are afraid of using “source builds” - Unreal Engine compiled from the source by a team, opening doors to modifying the engine. One of the reasons is they see the process of integrating of new engine version as painful and time-consuming.
This tutorial describes the easy process of integrating engine changes via GitHub, where the engine source code is available for everyone. It leverages Git infrastructure to merge engine changes without much hassle.
https://dev.epicgames.com/community/learning/tutorials/oZ9d/unreal-engine-integrating-engine-source-from-github-to-project-s-perfoce-repository