Stashing your changes

gistfile1.sh

# Stashing is a great way to pause what you’re currently working on and come 
# back to it later. For example, if you working on that awesome, brand new 
# feature but someone just found a bug that you need to fix. Add your changes to 
# the index using

  $ git add .

# Or add individual files to the index, your pick. Stash your changes away with:

  $ git stash

# And boom! You’re back to your original working state. Got that bug fixed? 
# Bring your work back with:

  $ git stash apply

# You can also do multiple layers of stashes, so make sure to use

  $ git stash list

# To check out all of your current ones. If you need to apply a stash from 
# deeper in the stack, that’s easy too. Here’s how to apply the second stash 
# you’ve got:

  $ git stash apply stash@{1}

# You can also easily apply the top stash on the stack by using 

  $ git stash pop

# A note with this command, it deletes that stash for good, while apply does 
# not. You can manually delete stashes with:

  $ git stash drop <id>

# Or delete all of the stored stashes with:

  $ git stash clear

http://gitready.com/beginner/2009/01/10/stashing-your-changes.html