Common git commands:

1. To cut a new branch from an existing one

       • git checkout -b "branch name"

2. To push the above created branch

       • git push –u origin “branch name”

3. To rename a branch 

       • git branch –m “old name” “new name”

4. To remove all the commits 

       • git reset –hard origin/branchName

5. To delete a branch (First remove remote)

       • git push origin :branchName

6. To delete a branch (Then Locally)

       • git branch –d branchName

       • git branch –D branchName (Forcefully)

7. To remove a file from staging area
       • git reset HEAD fileName

8. To remove commit 

• git reset --hard HEAD

then

• git push origin HEAD --force