How to revert a branch from an old turnip version?

Question

git

Balls RepaA, it was VetkaA, where I worked. Then RepuA was copied to RepuB and told to work with RepuB. RepeB has my logs from VetkaA. But when trying to go to it (git checkout BranchA), he does not find it. How can I return BranchA from RepaA to RepaB?