Tagging a Github Repository – Web Applications Stack Exchange

We have more than 200 repositories in our Github organization and those repositories belong to one of the 70+ business units in the company. We need to be able to tie those repositories to their BUs. Is there a way Github allows us to do such tagging at repo level.

I know there are Github Topics but that won’t work for us because these topics do not allow us to use spaces. The names of the BUs have spaces and there are many other automation scripts built on top of these names.

Any ideas?