I was looking for a way to install entirely from the command line (server/VM setup), and was able to do so by following the instructions from the documentation, copied below for reference.
- sudo apt-get install software-properties-common
- sudo curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | sudo bash*
- sudo apt-get install git-lfs
- git lfs install