git rebase --onto <куда> <начало ветки> <конец ветки>
Я, правда, из вашей картинки вообще ничего не могу понять.
Пример из git rebase --help:
First let’s assume your topic is based on branch next.
For example, a feature developed in topic depends on some functionality
which is found in next.
o---o---o---o---o master
\
o---o---o---o---o next
\
o---o---o topic
We want to make topic forked from branch master;
for example, because the functionality on which topic depends
was merged into the more stable master branch.
We want our tree to look like this:
o---o---o---o---o master
| \
| o'--o'--o' topic
\
o---o---o---o---o next
We can get this using the following command:
git rebase --onto master next topic