In TortoiseGit->Rebase window has these two selectors :

What is the purpose of Onto selector, while in Upstream you already select the branch you are rebasing onto.

CodePudding user response：

The onto option can be used to rebase some commits that are between the branch and the upsteam onto some other branch.

Onto in the Git docs: https://git-scm.com/docs/git-rebase#Documentation/git-rebase.txt---ontoltnewbasegt