I currently have a situation with cascading topic branches that I need to rebase
regularly. In the picture below, I want to rebase the tree starting with `E` to
be rebased onto master (my actually cascade is 4 branches deep).
A--B--C--D (master)
\
E--F (topic1)
\
G--H (topic2)
After running `git rebase --onto master master topic1`, I end up with
A--B--C--D (master)
| \
\ E'--F' (topic1)
E--F
\
G--H (topic2)
I then need to also run `git rebase --onto topic1 F topic2` to arrive at the
desired
A--B--C--D (master)
| \
\ E'--F' (topic1)
E--F \
| G'--H' (topic2)
\
G--H
Problem here is that I don't have a nice symbolic name for `F` anymore after the
first rebase. Rebasing `topic2` first is not really possible, because I do not
have a new graft-point yet. I currently write down `F` ahead of time (or use
`reflog` if I forgot) `F`, but I wonder if there is a better solution.
