This winds up not being a big deal if you use grep a lot because you'll tend toward greppable names.

More importantly though, in a codebase big/complicated enough to need "find references" functionality beyond what you get from grep, do you not also have comments, reflection, and all manner of other garbage that you need to search for via some mechanism anyway?

For a few languages (more on the way) you also have semgrep as a way to add something a bit more powerful than "find references" into a normal shell workflow.