How do you find all content fragment references?

Try this - ContentVariation ("The Adobe AEM Quickstart and Web Application.") 

package:

com.adobe.cq.dam.cfm ("The Adobe AEM Quickstart and Web Application.")

Thanks for the quick reply. I missed the Filter when looking for references. I am surprised that the ability to filter by variation hasn't come up.

I was using SQL2:

SELECT * FROM [nt:unstructured] AS comp
WHERE ISDESCENDANTNODE(comp, "[/content/parent/path]")
AND [sling:resourceType] = "dam/cfm/components/contentfragment"
AND comp.fileReference = "[content/dam/path/to/content/fragment]"

AND comp.variation = "[variationName]"

Is it possible to extend Site Reference to include a variation? It seems like that info could be available from the API.