[CT-1609] [Bug] Generate CLI API docs CI check not able to checkout PR branches from forks

[dbeatty10]

Is this a new bug in dbt-core?

• I believe this is a new bug in dbt-core
• I have searched the existing issues, and I could not find an existing issue for this bug

Current Behavior

When reviewing a community contributed PR, the Generate CLI API docs CI check failed with this message:

Error: A branch or tag with the name 'feature/dbt-deps-tarball' could not be found

Instance of this issue:
https://github.com/dbt-labs/dbt-core/actions/runs/3625104874/jobs/6113159381

Expected Behavior

Hoped that the CI check could run without erroring prematurely. e.g., if needed, checkout the branch from a fork rather than a local branch.

Steps To Reproduce

1. Run to run CI on a PR from a fork (i.e., a PR submitted by someone outside the dbt-labs organization)

Relevant log output

Run actions/checkout@v3
Syncing repository: dbt-labs/dbt-core
Getting Git version info
Temporarily overriding HOME='/home/runner/work/_temp/1d57006c-8385-4aa4-92f0-1c31e45309b6' before making global git config changes
Adding repository directory to the temporary git global config as a safe directory
/usr/bin/git config --global --add safe.directory /home/runner/work/dbt-core/dbt-core
Deleting the contents of '/home/runner/work/dbt-core/dbt-core'
Initializing the repository
Disabling automatic garbage collection
Setting up auth
Fetching the repository
Determining the checkout info
  /usr/bin/git branch --list --remote origin/feature/dbt-deps-tarball
  /usr/bin/git tag --list feature/dbt-deps-tarball
  Error: A branch or tag with the name 'feature/dbt-deps-tarball' could not be found

Environment

N/A

Which database adapter are you using with dbt?

No response

Additional Context

No response