I would like to delete Git logs after merging.
I have tried git rebase -i and git reset --hard but bbb branch commit logs doesn't change.
I have deleted bbb branch but 3 logs have not been deleted from the Sourcetree.
The bbb branch has 3 logs now,  so I would like to delete 2 commits from the log or delete bbb branch.
After deleting the bbb branch, Git condition is like this picture.
I still can see commit logs for the bbb branch.
I have tried git rebase -i xxx, and replaced to squash. But I still can see commit logs like this.
 
    