Can you add a file attachment to a service request through a URL?

**This post was created as part of a How to Service Request (SR)

Release: 11.13.22.04.0

Summary of the question:

Is it possible to add a file attachment to a service request through URL instead of an encoded file stream?

We would like to only send a temporary file URL to the server to have it internally converted and attached to the service request. We've tried using only the URL attachment POST request "{{baseURL}}/crmRestApi/resources/latest/serviceRequests/0000XXXXXX/child/Attachment" but it attaches the URL and not the file itself. Is there a solution to attach a file through URL instead of an encoded file stream?