Here are a few links that helped support an understanding git-lfs and properly cloning repos with git-lfs. These all aided me to clone several repos on Github that contained binarys and provide a good context of the technology. I use git daily but had never had the need for git-lfs.
Detailed S.O. post clarifying git-lfs commands and their git equivalent.
CodeThink Article that discusses the speed issues when handling large volumes of data (amongst other important items).