GitLab GPU test runners fail intermittently with "Could not resolve host: gitlab.com"

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Summary

GitLab test runners fail intermittently with "fatal: unable to access '.git/': Could not resolve host: gitlab.com

Steps to reproduce

Put this block in your .gitlab-ci.yml, using the GPU test runner, trigger the test runner, and you will observe a failure about 20% of the time.

gpu_tests:
  stage: test
  tags:
    - saas-linux-medium-amd64-gpu-standard
  image: nvcr.io/nvidia/cuda:12.1.1-runtime-ubuntu22.04
  script:
    - nvidia-smi

What is the current bug behavior?

The test fails without running any scripts as it cannot access gitlab.com to pull the repo.

What is the expected correct behavior?

This test should pass.

Relevant logs and/or screenshots

Possible fixes

Maybe you have some misconfigured test runner machine.