There are several options for installing Git on macOS. Note that any non-source distributions are provided by third parties, and may not be up to date with the latest source release.

Remove homebrew cocoapods installation in catalina, and install directly from gem, zsh version - fixcocoapodscatalina.sh. Install command: brew install boost. Also known as: boost@1.76. Collection of portable C source libraries. Step 4 — Installing, Upgrading, and Removing Packages. Now that Homebrew is installed, use it to download a package. The tree command lets you see a graphical directory tree and is available via Homebrew. Install tree with the brew install command: brew install tree.

Homebrew

Brew Install Catalina Permission Denied

Install homebrew if you don't already have it, then:
$ brew install git

Xcode

Cannot Install Homebrew On Catalina

Apple ships a binary package of Git with Xcode.

Binary installer

Tim Harper provides an installer for Git. The latest version is 2.32.0, which was released 20 days ago, on 2021-07-21.

Building from Source

If you prefer to build from source, you can find tarballs on kernel.org. The latest version is 2.32.0.

Installing git-gui

If you would like to install git-gui and gitk, git's commit GUI and interactive history browser, you can do so using homebrew
$ brew install git-gui