Need a bit more control over git branch name propagation

[bedge]

We use the branch name in artifact filenames. This works fine for develop, release, etc.
But when a branch has a / in it, ie: release/bugless, it breaks things because it adds a / into the filename.

I'd like to have a way to specify the branch suffix, ie: bugless, rather than always replacing all tokens with the full branch name.
Not sure exactly how one would do this with the current architecture.

Perhaps, allow a regex replacement for string parameters so that one could tie a regex replace to specific parameters to control their expansion?