EditorUtility.GetAssetPreview: how to control the rendering camera

We are trying to get control of the render camera that generates the output texture from EditorUtility.GetAssetPreview.
It is currently rendering from some position similar to Vector3(1,1,1).
Since the asset is a plane it would be nice to move the rendering camera so that it points directly at the asset.

Since there is no documentation of the GetAssetPreview function it seems impossible to find out.

Please help Unity staff!

As far as I can tell the only way to influence the output of this function is to adjust the rotation property of the object.