How to merge two branches on remote repos

Question

I have a remote repo. It has four branches i.e. master, branch1, branch2, branch3. I pushed changes to master repo. Now I want to add those changes to branch3. Do I have to merge them If yes then how can I do that?

Answer 1

Yes, first make sure you are in sync with your remotes:

checkout master
pull origin master
checkout branch3
pull origin branch3

then do the merge

merge master

then push if you need to

push origin branch3

Answer 2

I think it's just

git checkout branch3
git rebase master