• Describe a change number
  $ git show dc54076

• Reset the current branch with HEAD of master

  $ git fetch origin
  $ git reset --hard origin/master
  

• Keep your branch in sync with origina master branch
  $ git pull origin master

• Arrange all changes in order. Fixes the log too.
  $ git rebase origin wip_my_work

• Squash commits in one commit. 2 represents number of commits to review.
  $ git rebase -i HEAD~2

• Compare two branches
  $ git diff master..my_branch

• Modify a commit message
  $ git commit --amend

• Find diff of local file against remote master

  $ git fetch origin master
  $ git diff origin/master -- [local-path]
  

• Elaborate comment amend techniques

  • https://help.github.com/articles/changing-a-commit-message/

• Stash current commits

  $ git stash
  $ git stash list
  $ git stash apply stash@{0}
  

• Recover/ revert a file to original/master copy

  # For a committed file
  $ git checkout origin/master filename  
  
  # For a local, uncommitted file 
  $ git checkout -- filename
  

• Delete a local branch

  $ git branch -d branch_name
  $ git branch -D branch_name
  

• Squash local commits
  $git reset --soft HEAD~3 && git commit

• Delete files from staging

  $ git reset file_name
  

• Pull master’s changes to your local branch
  $git checkout my_branch
$git rebase master

• Push your local branch changes to master branch
  $git checkout my_branch
$git merge master

• Alias to add and commit a changed file

  $ git config --global alias.c "!git add -A && git commit -m"
  

Reference

• http://rogerdudler.github.io/git-guide/