If your checkout step is intermittently failing with the below error message (or similar), it can often be caused by networking issues :

These issues often occur when the size of your repository is large. You can resolve this issue by either using a custom checkout step in a run command with retries or a custom checkout step to implement a partial or shallow clone.

You can find more details on how to retry an intermittently failing step here. Your custom command will look like the following: