Merge pull request git-tips#49 from munendrasn/master

merge previous two commits into one.

Author: hemanth

README.md

@@ -101,6 +101,7 @@
 * [File diff between staging and the last file version.](https://github.com/git-tips/tips#file-diff-between-staging-and-the-last-file-version)
 * [Extract file from another branch.](https://github.com/git-tips/tips#extract-file-from-another-branch)
 * [List only the root and merge commits.](https://github.com/git-tips/tips#list-only-the-root-and-merge-commits)
+* [Merge previous two commits into one.](https://github.com/git-tips/tips#merge-previous-two-commits-into-one)
 
 <!-- Don’t remove or change the comment below – that can break automatic updates. More info at <http://npm.im/doxie.inject>. -->
 <!-- @doxie.inject end toc -->
@@ -689,5 +690,10 @@ git show <banch_name>:<file_name>
 git log --first-parent
 ```
 
+## Merge previous two commits into one.
+```sh
+git rebase --interactive HEAD~2
+```
+
 <!-- Don’t remove or change the comment below – that can break automatic updates. More info at <http://npm.im/doxie.inject>. -->
 <!-- @doxie.inject end -->