git undo script -- obviously git lacks a real undo feature, but sometimes in a moment frustration it can be worrying to not have the most common commands in mind after one makes a mistake. Just add a file named `git-undo` to a directory on your PATH and then run it with `git undo`

git-undo

#!/usr/bin/env bash -e

cat <<TEXT

Git has no undo feature, but maybe these will help:
===================================================

## Unstage work

  Unstage a file
  --------------
  git reset HEAD <file>

## Uncommit work (leaving changes in working directory):

  Undo the last commit
  --------------------
  git reset --soft HEAD^1

  Undo all commits back to the state of the remote master branch
  --------------------------------------------------------------
  git reset --soft origin/master

## Amend a commit

  Change the message
  ------------------
  git commit --amend -m 'new message'

  Add more changes to the commit (without changing the commit message)
  --------------------------------------------------------------------
  git add <file>
  git commit --amend --no-edit

## Discard uncommitted changes

  Discard all uncommitted changes in your working directory
  ---------------------------------------------------------
  git reset --hard HEAD

  Discard uncommitted changes to a file
  -------------------------------------
  git checkout HEAD <file>

## Discard committed changes

  Reset the current branch's HEAD to a previous commit
  ----------------------------------------------------
  git reset --hard <commit>

  Reset the current branch's HEAD to origin/master
  ------------------------------------------------
  git reset --hard origin/master

## Recovering work after a hard reset

  Restore work after you've done a `git reset --hard`
  ---------------------------------------------------
  $ git reflog
    1a75c1d... HEAD@{0}: reset --hard HEAD^: updating HEAD
    f6e5064... HEAD@{1}: commit: <some commit message>
  $ git reset --hard HEAD@{1}

TEXT
exit 1