Celery: How to get request/result from parent_id?

Let's say that I have set a breakpoint in the code bellow:

from celery import Celery

app = Celery('hello', broker...)

@app.task
def hello():
    breakpoint()
    return 'hello world'

If I execute in pdb: app.current_task.request I get:

<Context: {'lang': 'py', 'task': ..., 'id': '7ca0cbee-1a71-437c-b4be-c623429a2b21',... , 'root_id': '38ab28f2-9f79-45da-b2e5-f00bd0beb104', 'parent_id': '38ab28f2-9f79-45da-b2e5-f00bd0beb104', ...}>

Now I would like to get parent task (app.current_task.request.parent_id) in order to inspect its request/result.
Something like:

parent = ....get('38ab28f2-9f79-45da-b2e5-f00bd0beb104')
print(parent.request)
print(parent.result)

How to do that inside of the task where the breakpoint is set?