Checkout SHA on remote repo

[mickutz]

Hi,
I've got this snippet of code that looks to be a bit troublesome.

jobs:
  runJob:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v1
      - name: Checkout a different repo
        uses: actions/checkout@v2
        with:
          repository: <org>/<repo>
          ref: cccc8888
          token: ${{ secrets.GH_PAT }}
          fetch-depth: '0'

The intention is to checkout a specific commit SHA of the remote repository, however, the action seems to be checking only against branches or tags (as opposed to what the documentation says):

Determining the checkout info
  /usr/bin/git branch --list --remote origin/cccc8888
  /usr/bin/git tag --list cccc8888
  Error: A branch or tag with the name 'cccc8888' could not be found

Would anyone be able to advise whether I'm missing something or this can't actually be done?

[huyz]

Glad to see I'm not the only with this question. Sad to see no reply

[huyz]

This may be the solution: actions/checkout#1858

[huyz]

Looking at https://github.com/actions/checkout/blob/9a9194f87191a7e9055e3e9b95b8cfb13023bb08/src/input-helper.ts#L74 it seems possible to check out a specific SHA but a full-length 40-character SHA is required