Your git system have a bug. See 168.
Other mirrors(see README.md > "Domain list - mirrors: NixNet, CodeBerg") are not synced because of it.
posting here just so i can see replies (since apparently there's no other way to subscribe to an issue).
This is a serious show-stopping issue. How is it 2 months old? It's obviously important that users be able to do a git fetch to update forks.