Copy Fragments between Sandboxes - Deployment from lower envirnoment

Hi, It would be good if we can deploy Fragments from one sandbox to another e.g, from a sandbox in our lower environment (Test to Prod). 

Why is this feature important to you - We develop our email fragments in Test before adding them to Prod, it will save us time and make sure code is exactly same in both sandboxes.

How would you like the feature to work - Deployment from one sandbox to another, similar functionality as with Journeys (Copy to Sandbox)

Current Behavior - I have created several Fragments in our test sandbox and are now looking at promoting them to Prod as of now is a thorough, manual and slow process.