Try with tracing

tox.ini

@@ -8,7 +8,7 @@ envlist =
     py3{7,8,9,10,11}-opentelemetry-api
     pypy3-opentelemetry-api
 
-	  ; Test against both protobuf 3.x and 4.x
+    ; Test against both protobuf 3.x and 4.x
     py3{7,8,9,10,11}-proto{3,4}-opentelemetry-protobuf
     pypy3-proto{3,4}-opentelemetry-protobuf
 
@@ -94,6 +94,9 @@ setenv =
   ; i.e: CONTRIB_REPO_SHA=dde62cebffe519c35875af6d06fae053b3be65ec tox -e <env to test>
   CONTRIB_REPO_SHA={env:CONTRIB_REPO_SHA:"main"}
   CONTRIB_REPO="git+https://github.com/open-telemetry/opentelemetry-python-contrib.git@{env:CONTRIB_REPO_SHA}"
+  ; Enable more git debugging. With this change CI passes again (which is unexplained). See #3235.
+  GIT_TRACE=1
+  GIT_TRACE_SETUP=true
   mypy: MYPYPATH={toxinidir}/opentelemetry-api/src/:{toxinidir}/tests/opentelemetry-test-utils/src/
 
 changedir =
@@ -129,7 +132,6 @@ commands_pre =
 
   protobuf: pip install {toxinidir}/opentelemetry-proto
 
-  getting-started: git fetch --tags
   getting-started: pip install requests==2.26.0 flask==2.0.1
   getting-started: pip install -e "{env:CONTRIB_REPO}#egg=opentelemetry-util-http&subdirectory=util/opentelemetry-util-http"
   getting-started: pip install -e "{env:CONTRIB_REPO}#egg=opentelemetry-instrumentation&subdirectory=opentelemetry-instrumentation"