Add Stashing Only Unstaged Changes as a git til.

README.md

@@ -34,6 +34,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Single Key Presses in Interactive Mode](git/single-key-presses-in-interactive-mode.md)
 - [Staging Changes Within Vim](git/staging-changes-within-vim.md) 
 - [Staging Stashes Interactively](git/staging-stashes-interactively.md)
+- [Stashing Only Unstaged Changes](git/stashing-only-unstaged-changes.md)
 - [Stashing Untracked Files](git/stashing-untracked-files.md)
 - [Verbose Commit Message](git/verbose-commit-message.md)
 

git/stashing-only-unstaged-changes.md

@@ -0,0 +1,30 @@
+# Stashing Only Unstaged Changes
+
+If you have both staged and unstaged changes in your project, you can
+perform a stash on just the unstaged ones by using the `-k` flag. The
+staged changes will be left intact ready for a commit.
+
+```
+$ git status
+On branch master
+...
+Changes to be committed:
+
+    modified:   README.md
+
+Changes not staged for commit:
+
+    modified:   app/models/user.rb
+
+$ git stash -k
+Saved working directory and index state ...
+
+$ git status
+On branch master
+...
+Changes to be committed:
+
+    modified:   README.md
+```
+
+h/t [Chris Erin](https://twitter.com/MCNormalMode)