fix: don't cache rollups if branch none

[joseph-sentry]

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Codecov Report

All modified and coverable lines are covered by tests ✅

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.98%. Comparing base (a723522) to head (55b8d01).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #943   +/-   ##
=======================================
  Coverage   97.98%   97.98%           
=======================================
  Files         445      445           
  Lines       35754    35755    +1     
=======================================
+ Hits        35034    35035    +1     
  Misses        720      720           

Flag	Coverage Δ
integration	42.11% <100.00%> (+<0.01%)	⬆️
unit	90.61% <0.00%> (-0.01%)	⬇️

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[Swatinem]

The change makes sense, I just wonder how this can happen in reality? Under which circumstances will there be no branch at all?

[joseph-sentry]

The change makes sense, I just wonder how this can happen in reality? Under which circumstances will there be no branch at all?

it's possible that it's something about not being able to fetch the branch from the github api