Git 2.23 was released: "git checkout" becomes "git switch" (change branch) and "git restore" (set contents of file to a previous revision). "git checkout" still works (and probably will work forever). https://lwn.net/Articles/796563/
This is the Mastodon server used by @h2g2bob. Most posts are public, take a look around.
Why not take a look at dbatley.com for other interesting stuff.