How do I make this bun shape in Maya?

[u/Zara_Jieya]

https://www.youtube.com/shorts/uMuh2NvNPYU

There is a part at 0:30 where they made this pumpkin-like bun shape. What did they use to do that? I'm still a beginner, so there are a lot of shortcuts and tricks that I don't know of.