GetReferencesToContent result is incorrectly cached

Description

GetReferencesToContent result is incorrectly cached.

Step to reproduce:

1. Use IContentRepository.GetReferencesToContent to get content reference to an asset.
2. Add the asset to, or remove it from some catalog content.
3. Use IContentRepository.GetReferencesToContent again.

Expected:

Result list is updated.

Actual:

Result list is not updated.