Is there a way to get all commit history for a single branch?

I’m using this action like this (this works splendidly):

- name: Check Out Code
  uses: actions/checkout@v2
  with:
    ref: ${{ env.BRANCH }}
    fetch-depth: 0

I only need to get the entire commit history for just that one ${{ env.BRANCH }}. But using fetch-depth: 0 gets all commit history for all branches and tags, which is unnecessary in my case. Is there a way to get the entire commit history for just the branch referenced in the ref?

[solarmosaic-kflorence]

It would probably be better if there was just an action that set up credentials and let users run their own fetches.

[lourd]

Here’s the job yml for the workaround I just figured out for my use case of running tests and linting on pull requests on my team’s Nx monorepo, in case anyone else finds this later with a similar need:

  lint-and-test:
    runs-on: ubuntu-latest
    steps:
      - name: Check out repository
        uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - name: Add PR base ref
        # Fetch the ref of the base branch, just the single commit.
        run: git fetch --depth=1 origin +refs/heads/${{github.base_ref}}:refs/remotes/origin/${{github.base_ref}}
      - name: Track PR base branch
        # Turn the just-fetched ref into a local branch.
        run: git branch --track ${{github.base_ref}} origin/${{github.base_ref}}
      - name: Fetch commits in-between base and HEAD
        # While the ancestor commit between HEAD and the branch base isn't in the local tree
        # fetch X more parent commits of the branch base and branch head.
        run: |
          while [ -z $( git merge-base ${{github.base_ref}} HEAD ) ]; do     
            git fetch --deepen=10 origin ${{github.base_ref}} HEAD;
          done
        # Sets the commit SHAs of head and branch base into two environment variables
        # that `nx affected` will read from.
      - name: Derive SHAs for base and head for `nx affected` commands
        uses: nrwl/nx-set-shas@v2
        with:
          main-branch-name: ${{github.base_ref}}
      - uses: actions/setup-node@v2
        with:
          node-version: 16.x
          cache: yarn
      - name: Install dependencies
        run: yarn install
      - name: Lint
        run: yarn nx affected --target=lint
      - name: Tests
        run: yarn nx affected --target=test