To Install dgit without Homebrew

Download dgit

Download the OS appropriate version for your version of macOS or linux.
tar -xf dgit-macOS-x86_64.tar.gz

Extract the files

Extract the two files from the archive you downloaded, adjusting the command as appropriate.
mv git-remote-dgit $SOMEWHERE_IN_YOUR_PATH

Place the files in your path

Move the two files to somewhere in your $PATH like /usr/local/bin.
Runs on Unicorn Platform