Hi @lucio.gabardini.exte, Prismic offers repository cloning for Platinum & Enterprise Level plans. If you are interested in learning more about this, we can connect you with one of the Account Managers.
If that is beyond the scope of your project, then you can copy your Custom Type JSON code from one repo to the other and then you can recreate your content. You can use the Import/Export feature (available starting with the Medium plan) to help copy your content over. You can read more about the Import feature here.
Introduction to the Import/Export
Prismic also has a feature called Themes that allows you to launch a new repository with Custom Types that you pre-configure. You can read more about it here:
How to create a theme to quickstart your projects for Prismic
Let me know if you have any questions about any of this.