Pylint checker fails on forked repos

[briandrawert]

  git checkout $HEAD_REF
  shell: /usr/bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.1[2](https://github.com/StochSS/GillesPy2/actions/runs/10097218183/job/27921538187?pr=956#step:5:2).4/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/[3](https://github.com/StochSS/GillesPy2/actions/runs/10097218183/job/27921538187?pr=956#step:5:3).12.4/x64/lib
    HEAD_REF: cpp_variables_issue
error: pathspec 'cpp_variables_issue' did not match any file(s) known to git
Error: Process completed with exit code 1.

https://github.com/StochSS/GillesPy2/actions/runs/10097218183/job/27921538187?pr=956

Needed to merge #956