Re: git rebase --interactive squash/squish/fold/rollup

branch, hack, commit.
hack, commit, hack, commit

What if you used  commit --append  instead?

The trouble though of squashing all the commits into one is that it
makes it impossible to bisect later.  Are you really sure that your
final commit cannot be broken into small commits?  Ideally each commit
is small but self contained.  Squashing should be done only to fix
cases where you introduced a bug then fixed it, or to fix a partial
implementation etc.

John