Imagine that you built your work on your master branch on top of
the v1.0 release, and want it to be integrated into the project.
First you push that change to your public repository for others to
see:
git push https://git.ko.xz/project master
Then, you run this command:
git request-pull v1.0 https://git.ko.xz/project master
which will produce a request to the upstream, summarizing the
changes between the v1.0 release and your master, to pull it
from your public repository.
If you pushed your change to a branch whose name is different from
the one you have locally, e.g.
git push https://git.ko.xz/project master:for-linus
then you can ask that to be pulled with
git request-pull v1.0 https://git.ko.xz/project master:for-linus