move Commits from one Branch to another

moveBranch.sh

git branch newbranch      # Create a new branch, saving the desired commits
git reset --hard HEAD~3   # Move master back by 3 commits (GONE from master) 
git checkout newbranch    # Go to the new branch that still has the desired commits
git reset --hard a1b2c3d4

# Existing Branch

git checkout existingbranch
git merge master
git checkout master
git reset --hard HEAD~3 # Go back 3 commits. You *will* lose uncommitted work.
git checkout existingbranch