don't fetch specific branch

Author: melonora

.github/workflows/test.yml

@@ -124,7 +124,7 @@ jobs:
           PIP_CONSTRAINT: ${{ github.workspace }}/benchmarks/benchmark.txt
 
       - name: Fetch main branch
-        run: git fetch origin main:main
+        run: git fetch origin
 
       - name: Run benchmarks latest release
         # here we check if the benchmark on the latest release is not broken