feat(lib): support checkout to pr commit sha

[purelind]

support checkout not merged pr commit sha.

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Based on the pull request title and description, it seems that this change is adding support for checking out to a specific commit SHA of a pull request that has not been merged.

The key change in the diff is the addition of a conditional statement that checks if the branchOrCommit parameter is a 40-character SHA1 hash. If it is, then the code adds a reference to pull requests in the refspec, allowing the user to check out to the specific commit of the pull request.

One potential issue is that the code does not check if the SHA1 hash provided is actually associated with a pull request. This could result in errors if the hash is not a valid pull request commit SHA.

To fix this issue, it would be good to add a check to confirm that the SHA1 hash provided is associated with a pull request before attempting to check out to that commit. Additionally, it would be helpful to add some error handling in case the hash provided is not associated with a pull request.

Overall, this seems like a useful addition to the codebase for those who need to check out to specific pull request commits.

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Based on the PR title and description, it seems that the changes are adding support for checking out to a commit SHA that belongs to a pull request that has not yet been merged.

The key change is in the checkoutSingle function, where an if statement has been added to check if the branchOrCommit parameter is a SHA and, if so, to add a new refSpec that fetches pull request refs and maps them to refs/remotes/origin/pr/*.

There don't appear to be any obvious potential problems with the changes, but there are a few suggestions for improvement:

• It might be a good idea to add some comments to explain the new code and its purpose, as it could be non-obvious to someone who is not familiar with the context.
• The println statement in the new if block is likely just for debugging purposes and should probably be removed or replaced with more meaningful logging.
• It's possible that the timeout parameter in the checkoutSingle function is not needed, as it is not used in the function body. If it is not needed, it should be removed to avoid confusion. If it is needed, it should be used appropriately in the function body.

Overall, the changes look reasonable and should be functional.

[ti-chi-bot]

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