Inability for codex to access GIT history

Coding with ChatGPT
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Until recently, Codex could access and analyze my repository’s full Git history when connected to GitHub. This meant I could ask it to review changes over time, compare versions, or summarize commit activity, and it would traverse the actual commit history just like running git log locally.

That capability was hugely valuable — I relied on it for workflows like weekly commit summaries, change analysis, and historical code reviews. Codex could not only view the latest version of a file but also inspect past versions, diffs, and the context around when changes were made.

A few weeks ago, this stopped working. Now, when Codex loads the repo, it appears to only see a single commit containing the entire current source. Any request to look at earlier versions fails because it has no history to traverse.

Nothing changed on my end — same repo, same connection — but Codex’s behavior changed. Losing access to historical versions has broken a lot of workflows that depended on that context.

Has anyone else seen this change? Was there a deliberate update to how Codex pulls repositories from GitHub that removed commit history access?

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I can confirm that within codex “runner” there’s only a single (grafted) git commit available - I only tried it a few days ago, so don’t know if the behaviour changed here.
I tried to edit the environment’s setup script and fetch the full git history (e.g. with git fetch --unshallow) which seems to work within context of the setup script, but within the actual cursor run context this history seems not to be available still.
I guess one could enable the environment’s network access & refetch the git history, but it feels like a waste of resources + possibly security issue :thinking: