Hi, Thanks for reporting!
I don't see any error messages in https://lists.debian.org/debian-go/2026/03/msg00034.html, nor is there any output from `git debpush` or something. The Bug#908747 does not have the error message either and it does not differentiate between /.gitignore and debian/.gitignore. The dh-make-golang package has been generating a /.gitignore file in the project root for many years. The change now is that it was moved to `debian/.gitignore` as Debian packages should not be polluting the upstream "file namespace". Is your suggestion to just stop having a `.gitignore` at all? Searching https://codesearch.debian.net/search?q=debian%2F.gitignore&literal=1 yields quite a lot of packages having a `debian/.gitignore`. I don't think it is a sensible stanze to take that such a file is forbidden. It is a pity the dpkg maintainer hasn't responded to Bug#908747 since 2018 when it was filed..
