Extract git 2.39.2
What does this MR do?
Adds a brew extract step to make specific formula versions available. Then it installs git 2.39.2.
Why was this MR needed?
To mitigate CVE-2022-23521 and CVE-2022-41903.
What's the best way to test this MR?
Build the image and run git --version. Should be 2.39.2.