How to move bugfixes across branches in DVCS?

Question

If we discover bug in some branche we fix it (check New release on picture). But also we interesting in moving this fix to Old release and Main de

Answer 1

You could:

1. Find common parent. Thanks to Novelocrat for this step.
   git merge-base branch1 branch2 branch3 ...

2. Checkout the common parent
   git checkout A

3. create new branch to fix bugs on
   git checkout -b bugFix

4. Make bug fixes and commit them to bugFix branch

5. Checkout branch that needs the bug fix
   git checkout branchToApplyFixTo

6. Merge the bugFix into the branch
   git merge bugFix