You can install Git on macOS Big Sur, Catalina, Mojave, Sierra, or an older Mac OSX version by a couple of options, one is to use Homebrew to install Git by installing Homebrew first and then issuing:
brew install git
You can also download install a easy to install package file getting the latest git version from the SourceForge .
This will download the latest version of Git to your desktop/download area as a dmg file, (it says mavericks in the file name but just ignore that)
Open the dmg file, then Control/Right Click the git.pkg file to install.
When Git is installed check in the Terminal, launch the Terminal from /Applications/Utilities and check the version:
And the version is displayed
git version 18.104.22.168
To see where it is located
And the location is shown
Upgrading Git from a previous version to the latest
If you have previously installed Git you can upgrade to the latest version by uninstalling the previous install by using the uninstall.sh script…
Go through the same process of downloading and mounting the latest git .dmg.
Your previous Git configuration settings and working repositories remain intact.
Trumping Xcodes Older Git
If you have Xcode already installed and have installed command line tools then you already have Git, probably an older version which is distributed with Xcode, this is installed in a path that takes precedence at:
The Mojave version is:
git version 2.24.3 (Apple Git-128)
To run the latest version you need to adjust your shell path so that /usr/bin/git runs after /usr/local/bin
So add into the path similar to the below and keep what you already have in the path, each segment is separated by a colon:
Restart or reload the Terminal and the newer Git version will now be used.
Learn how to set up a Git workflow with your local OSX client and a remote webserver.