Git into merges your current branch into the given remote branch, first resetting your local version of the given branch to remote's version thereof. To be invoked with a deep southern accent.

git-into

#!/bin/sh
# Place in your path and invoke with a deep southern accent: `git into staging`
mergeinto="$1"
if [[ $(git status -s) ]]; then
  echo "Your working directory is not clean, please commit or stash first."
  exit 1
else
  branch=$(git rev-parse --abbrev-ref HEAD)
  git fetch > /dev/null
  git checkout "$mergeinto"
  git reset "origin/$mergeinto" --hard
  output=$(git merge "$branch" --no-edit)
  ecode=$?
  if [[ $ecode == 0 ]]; then
    echo "Successfully merged into $mergeinto"
    git push origin "$mergeinto"
    echo "Pushed $mergeinto"
    git checkout "$branch"
  else
    echo "There were problems merging $branch into $mergeinto. To safely return to whence you came:"
    echo "$$ git merge --abort && git reset origin/$mergeinto && git checkout $branch"
  fi
fi