If you have a git branch at the remote origin and you want to completely delete this branch both from the local and the remote location, then you should follow the below git commands on the command line (or the terminal if using the Mac)
For demonstration, lets create a feature/local branch myproject/ticket-1
% git checkout -b "myproject/ticket-1"
Switched to a new branch 'myproject/ticket-1'
Now let us push this branch to origin (remote git server, which is GitHub in our case),
% git push git push -u origin myproject/ticket-1
...
remote:
To https://github.com/myuser/mynotes.git
* [new branch] myproject/ticket-1 -> myproject/ticket-1
branch 'myproject/ticket-1' set up to track 'origin/myproject/ticket-1'.
Git Delete Branch: Local
Options to delete Git Branch Locally
git branch -d local-branch-name
git branch -delete local-branch-name
git push origin -d -f local branch-name
git push origin --detete --force local branch-name
Example:
# git branch -d myproject/ticket-1
error: The branch 'myproject/ticket-1' is not fully merged.
If you are sure you want to delete it, run 'git branch -D myproject/ticket-1'.
% git branch --delete --force myproject/ticket-1
Deleted branch myproject/ticket-1 (was 601a63a).
Make use of the option -d (delete) and -f (force) options to delete the local branch if not fully merged. You can also use -D instead of -d -f to ignore checking merged status.
✋️ Note: If you are on the feature branch and try to delete it you will get an error "commit delete branch", make sure you are on main/master or some other branch when you execute this command.
Example:% git branch --delete --force myproject/ticket-1
error: Cannot delete branch 'myproject/ticket-1' checked out at '/myproj'

Git Delete Branch: Remote
To delete a git branch from the remote origin, you can push the branch with -d or --delete option,
Options to delete Git Branch from Remote (GitHub/BitBucket)
% git push origin --delete branch-name
% git push origin -d branch-name
% git push origin -d myproject/ticket-1
Username for 'https://github.com': mygithubuser
Password for 'https://mygithubuser@github.com':
To https://github.com/mygithubuser/myproj.git
- [deleted] myproject/ticket-1

Related Questions
- How to remove a Git Local Branch?
- How to remove a Git Remote Branch?
- Github - How to delete a branch?
Related Articles:
- GitHub Doc - Creating and deleting branches within your repository
- GitHub Docs - Deleting and restoring branches in a pull request
- Git Branch Documentation
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