# undo the last commit, but leave the changes available
git reset HEAD~ --soft
git stash -m "your stash message"
# move to the correct branch
git checkout name-of-the-correct-branch
#check the stash list first
git stash list //press q to quit the
git stash pop stash@{n} //where n is stash number to of your message
git add . //or add individual files
git commit -m "your message here"
# now your changes are on the correct branch