I mean, you could just make a folder with a text file in it for each issues. People can write comments in it. Move them into a "complete" folder when done. Writ

I mean, you could just make a folder with a text file in it for each issues. People can write comments in it. Move them into a "complete" folder when done. Write down who it's assigned to at the top. You wouldn't get some of the more complex features of course, but I'm not sure a git built in issue tracker could do most of that anyway. Not clear how it could send email notifications?