On the main branch, we commonly rebase our WIP branches to latest HEAD,
before merging them with "--no-ff". The effect is to have a merge commit
that acts as a parentheses around the set of patches.
When backporting such a branch, we should preserve that structure and
take the merge commit too. We should must use `git cherry-pick -x` to
record the commit IDs of the original patch.
This script helps with that.
Also hook it up in "contrib/scripts/nm-setup-git.sh" to create an alias
for it. This alias has the advantage, of fetching the latest version of
the script from "main" or "origin/main", so it also works on older
branches.
You can of course just clone NetworkManager repository and start hacking
as you like. However, there are a few things like git-notest which are
interesting to setup.
Add a script to do this.
The script is supposed to be idempotent and do nothing, unless
necessary. By default it also only prints what it would do.
