Merging a changelist from the GitHub engine code to my local repository

Just became an UE4 subscriber today.

Going through the process of building the engine code for the first time.

The build failed during the first attempt with the following error:
“System.Runtime.InteropServices.COMException”.

AnswerHub tells me that there is already a fix that has been checked in:
CL 2244406 : Added code to handle COM crashes when detecting physical processor etc

Qn is how do I merge this changelist from the GitHub engine source depot to my local repository?

Thanks in advance for any answers.