fix fetch stripping trailing ? from url

[KhafraDev]

fixes #4836

claude wrote the tests, I wrote the fix

[KhafraDev]

a ✅ in the ci without rerunning any jobs? it's a miracle

[mcollina]

lgtm

[mcollina]

a ✅ in the ci without rerunning any jobs? it's a miracle

I've been relentlessy chasing this for months ;).

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.14%. Comparing base (1867fb7) to head (1b823ea).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4837      +/-   ##
==========================================
- Coverage   93.19%   93.14%   -0.06%     
==========================================
  Files         109      109              
  Lines       34228    34228              
==========================================
- Hits        31900    31882      -18     
- Misses       2328     2346      +18     

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