Help with source only upload

[Elías Alejandro <ealmdz@gmail.com>]

Hello,
I hope you are doing well.
Do you know what's the option to generate with gbp a Source Only Upload
for packages after its first debian release?
The following sentence:

gbp buildpackage --git-pbuilder --git-pbuilder-options=--source-only-changes

works fine for package_version-1 but I'd like to do the same for
package_version-2 and generate the source-only .changes file

Best regards.
Elías