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Currently we are planning to switch from our software version 5.x.x to 6.x.x. Such major releases contains in our case a lot of refactoring work and changing the software architecture. Instead of creating a new branch for version 6 (git), I thought to create a custom repository for this. In general, developing the new version bases on the old version, so it would be a copy.
My problem is that developing version 5 will not stop, because bug fixes and a few minor changes will be done. But now I have two versions I am working on, in two separate repositories. What is the best way to make changes in both, without copy code, or do the work twice? Is there some effective way?
Maybe some one else has the same issue before.