fatal: 'upstream/.orig' is not a valid tag name

[come-maiz]

When trying to package github.com/oapi-codegen/runtime I get:

2025/07/07 14:47:26 Determining upstream version number
2025/07/07 14:47:26 Found latest tag "next"
2025/07/07 14:47:26 WARNING: Latest tag "next" is not a valid SemVer version
2025/07/07 14:47:26 Latest tag "next" matches master
2025/07/07 14:47:26 Package version is ""
...
gbp:error: Import of /home/agami/workspace/debian/golang-github-oapi-codegen-runtime_.orig.tar.gz failed: Error running git tag: fatal: 'upstream/.orig' is not a valid tag name.
gbp:error: Error detected, Will roll back changes.
gbp:error: Rolled back changes after import error.
2025/07/07 14:47:28 Could not create git repository: import-orig: exit status 1

[come-maiz]

If I specify --git_revision v1.1.1 it fails the same.
This seems to be fixed by #227.