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additional-material/additional-material.md

@@ -13,3 +13,7 @@ This document provides information about how to keep your forked repository up-t
 ### [ Reverting a commit](reverting-a-commit.md)
 This document provides information about how to revert a commit on the remote repository. It comes in handy in case you when you need to undo a commit that has already been pushed to Github.
 > Take these steps if you want to reverse a commit.
+
+### [ Amending a commit](amending-a-commit.md)
+This document provides information about how to amend a commit on the remote repository. 
+> Use this when you need to adjust a commit you made.

additional-material/amending-a-commit.md

@@ -0,0 +1,49 @@
+## Amending a Commit 
+
+What if you commit a change to your remote repository only to realise later that you have a typo in the commit message or you forgot to add a line in your most recent commit. 
+How do you edit that? This is what this tutorial covers.
+
+### Changing a recent commit message after you have pushed to Github.
+To do this without opening a file:
+* Type in the ```git commit --amend -m "followed by your new commit message"```
+* Run ```git push origin <branch-name>``` to commit the changes to the repository.
+
+Note: If you type in just ```git commit --amend```, your text editor would open up prompting you to edit the commit message.
+Adding the ``-m`` flags prevents it.
+
+### Modifying on a single commit
+
+So, what if we forgot to make a minor change to a file like changing a single word and we have already pushed the commit to our remote repository?
+
+To illustrate here is a log of my commits:
+```
+g56123f create file bot file
+a2235d updated contributor.md
+a5da0d modified bot file
+```
+Let's say I forgot to add a single word to the bot file
+
+There are 2 ways to go about this. The first is to have an entirely new commit that contains the change like so:
+```
+g56123f create file botfile
+a2235d updated contributor.md
+a5da0d modified botfile
+b0ca8f added single word to botfile
+```
+The second way is to amend the a5da0d commit, add this new word and  push it to Github as one commit. 
+The second sounds better since it is just a minor change.
+
+To achieve this, we would do the following:
+* Modify the file. In this case, I will modify the botfile to include the word I omitted previously.
+* Next, add the file to the staging area with ```git add <filename>```
+
+ Usually after adding files to the staging area, the next thing we do is git commit -m "our commit message" right?
+ But since what we want to achieve here is to amend the previous commit, we would instead run:
+
+* ```git commit --ammend```
+ This would then bring up the text editor and prompt you to edit the message. You can decide to leave the message as it was before or change it.
+* Exit the editor
+* Push your changes with ```git push origin <branch-name```
+
+That way, both changes would be in one single commit.
+