For the last week, every Update to Latest Package Version ends with the error fatal: unable to access 'https://github.com/firebase/firebase-ios-sdk/': Failed to connect to github.com port 443 after 31891 ms: Couldn't connect to server. This could be firebase-ios-sdk or another package. The timeout in the example given is 31,891 ms, but it could be more than 75,000 ms. However, other packages from GitHub are updated without errors. The next attempt may return the same error with the same repository, or with a different one, while the repository from the previous attempt is updated normally.
This only happens in Xcode; pure Git performs clones (with and without mirrors), fetching, pulling, and any other actions permitted without any error.
What happened, and how can I restore normal package management?
MacOS 26.0.1
xcode 26.0.1