If you have accidentally committed the wrong files into Git, but haven’t yet pushed it to the server, you can recover, or undo your commit as follows:
How to Undo a Commit and Redo it
You have just committed a file, and find yourself here;
We will call this “your accident location”.
Step 1
git commit -m "This is what you've just done"
Step 2
Start by resetting:
git reset HEAD~
Step 3
Now you can edit your files as required.
Step 4
When you are done, run the following commands:
git add .
git commit -c ORIG_HEAD
A note on Step 2
Step 2 said to use git reset HEAD~
Note that HEAD~ is the same as HEAD~1, which can allow you to undo a certain amount of commits. As we only stipulated 1 or simply ~, it only undid 1 place.
Swap this out for a greater number if you want to undo a larger amount of commits.