Clone. Run ./install.sh
. YouCompleteMe will take a while.
sudo add-apt-repository ppa:git-core/ppa
sudo apt update
sudo apt install git
git config --global pull.rebase true
git config --global rebase.autoStash true
git config --global push.autoSetupRemote true
git config --global merge.directoryRenames true
Use the install script of https://github.com/junegunn/fzf