--terragrunt-source-map seems to be ignored

[fellnerse]

Describe the bug
I don't know how to use the --terragrunt-source-map param, it seems like it's completely ignored for me.

To Reproduce
We are using private repositories hosted in azure devops. The code to include another repo looks like this:

module "core_api_specification" {
  source = "git::[email protected]:v3/<organization>/<project>/<repo>//<subpath>?ref=feature/random-feature"
  ... 
}

So far so good. I'm able to get the code with terragrunt get can plan and apply. But when I try to overwrite this source path with --terragrunt-source-map git::[email protected]:v3/<organization>/<project>/<repo>=/abs/path/to/local/repo//<subpath> it is completly ignored. I tried basically all premutations how you would be able to change the url, but the output from --terragrunt-log-level debug never contains anything from the second part (that should be used instead of the url).

Expected behavior
I expect it to actually use the local path. Could you help me understand what I'm doing wrong?

info
terragrunt version v0.38.4
Terraform v1.2.4 on darwin_arm64

[DomWeldon]

I don't suppose you ever got anywhere with this? Having the exact same issue currently.