All fixes and features for the upstream open-telemetry/opentelemetry-collector should be submitted to the upstream project. However, merge and release into the upstream might take some time therefore urgent patches can be applied to the fork hypertrace/opentelemetry-collector.
Edit go.mod to use forked collector with branch main+patches:
go mod edit -replace go.opentelemetry.io/collector=github.com/hypertrace/opentelemetry-collector@main+patches