You can setup automatic relations based on some rules. It is mostly needed for integrations, but I think you will invent other interesting cases. Below we automatically link Pull Requests from GitHub to User Stories in Fibery.
Here is the formula that extracts user story id from “fibery/us#123 some name”
If(StartsWith(Name,"fibery/us#"),Trim(ReplaceRegex(Name,"fibery\/us#(\d+).+"," \1 ")),"")
And here is the place where to enable the rule: