fix: remove explicit ref from docs job checkout to support fork PRs

[nh13]

Fixes the issue in #1125 where the markdown doc generation failed: https://github.com/fulcrumgenomics/fgbio/actions/runs/20318274458/job/58367927183?pr=1125

This was due to github.head_ref checkout out the right branch name but the wrong repo (not the fork).

[coderabbitai]

Warning

Review limit reached

You’ve reached a temporary PR review limit under our Fair Usage Limits Policy.

Your recent review volume is higher than typical usage, so adaptive limits are currently applied.

Next review available in: 31 minutes

Enable usage-based reviews in Billing to review now. Otherwise, wait until the next included review is available.
You're only billed for reviews past your plan's rate limits ($0.25/file).

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 94c9e01a-77fe-4516-9a46-57eb6376576a

📥 Commits

Reviewing files that changed from the base of the PR and between c728525 and ce2c5a1.

📒 Files selected for processing (1)

• .github/workflows/unittests.yaml

📝 Walkthrough

Walkthrough

The workflow removes explicit ref assignments from two Checkout steps in the unittests workflow. The test job and docs generation step now rely on default Checkout behavior instead of forcing github.head_ref. Both steps maintain fetch-depth: 0, with the test job also keeping lfs: true. No logic changes, error handling modifications, or public entity alterations are included.

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title accurately describes the main change: removing explicit ref from docs job checkout to fix fork PR support.
Description check	✅ Passed	Description directly relates to the changeset, referencing issue #1125 and explaining the root cause of the checkout failure.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-fork-pr-docs-checkout

---

_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.95%. Comparing base (a2b31ad) to head (ce2c5a1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1126   +/-   ##
=======================================
  Coverage   95.95%   95.95%           
=======================================
  Files         132      132           
  Lines        8347     8347           
  Branches      984      984           
=======================================
  Hits         8009     8009           
  Misses        338      338           

Flag	Coverage Δ
unittests	95.95% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[github-actions]

PR Preview Action v1.6.1
🚀 View preview at https://fulcrumgenomics.github.io/fgbio/pr-preview/pr-1126/
Built to branch gh-pages at 2026-07-22 22:39 UTC. Preview will be ready when the GitHub Pages deployment is complete.