How to reuse registered parsers for doskey macros?

I'm using [git.lua](https://github.com/vladimir-kotikov/clink-completions/blob/master/git.lua) as an example.

Here is my macro:
```
gco=git checkout $*
```

How to get `gco` to complete like `git checkout`? Ideally without modifying the original `git.lua`.

