You know a certain change made it onto the main branch. You'd like to know if that changes has been integrated back into the development and staging branches. If you have a specific git sha associated with that change, there is a handy way to check.
$ git branch --contains 50e1151The --contains flag of the
git-branch command will list all
branches locally that contain the given commit sha.
If you don't see any output, then no branches have that sha. This means either there are remote changes that you need to pull down or you're looking at the wrong repo.
See man git-branch for more details.