How to create Custom Actions in Windows with system git

[David Sherwood]

I had some Custom actions that invoked git under Windows. It used the embedded path to git. But now SourceTree will not let me use embedded version. It insists on using the system version. How do I find the path for the Parameter field? I've search for git.exe and found multiple ones. I assume the Terminal window is using it but it does not say either.

So what do I put in the Parameter field?