This happened to me after some power fluctuations in a storm caused some unexpected reboots. Here were the issues I noticed:

• Nothing in my Git Repository window.

• A prompt to configure my user name and email address.

• "No branches" in my Git Changes window.

• "Select Repository" in the bottom right corner.  The repo I want to use is listed, but I can't seem to switch to it.

  Here's what I tried, unsuccessfully:

• I restarted VS22 (didn't help)

• I restarted Windows 11 (didn't help)

• I tried to open a local clone of a different project (same issues)

• I tried changing Options -> Source Control -> Plug-in Selection to "None" and then back to "Git" (didn't help)

• I tried updating settings in Options -> Source Control -> Git Global Settings (wouldn't retain changes)

• I renamed and replaced my %userprofile%\.gitconfig file (didn't help)

In the end, the issue was that my C:\Program Files\Git\etc\gitconfig file was corrupt. It wasn't empty, but when I opened it with notepad, I just saw lots of blank spaces. I replaced it with a copy of the file that I got from a coworker, and that resolved all of my problems.