Issue detecting commit SHA. Please run actions/checkout with fetch-depth > 1 or set to 0

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To follow up on my own question, looking at the Github Actions console output, the default git fetch command used by actions/checkout does include --depth=1.

So, the answer is yes: If using actions/checkout in a workflow, fetch-depth needs to be explicitly set to override the default value of 1. Our workflow now contains this step:

    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0

Which cleared up the Codecov error message regarding the commit SHA.

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