echjordan
commented
6 years ago From https://platform.github.community/t/something-went-wrong-with-your-query-new-error-code/5145/9
We don’t support back-pagination on the Commit history connection without a before argument for performance reasons. That means in a big repository, you can’t find the first commit without making {number of commits}/100 queries.
We’re looking into better ways to address this use-case, but for now, you could create a ref pointing at the initial commit and use the Repository.ref field
Many repos are forked from another repo, then dissociated from the source repo by the person who forked. Unfortunately, the GitHub API will report these as non-forks.
One way to detect these "post-fork" repositories is to collect the SHA of their first commit. When looking at a collection of repos with a common first commit SHA, the repo with the oldest creation data is identifiable as the source.