Git can be installed using Debian apt with apt install git
which version depends on the distribution.
This configuration manual ensures having the latest Git version on a system.
A PPA is available for this purpose and is specified on the Git-website which makes it easy.
For this we need application add-apt-repository to add PPA's located in the package software-properties-common.
apt-get install software-properties-common
Now for Git execute the following command.
add-apt-repository ppa:git-core/ppa