git-upstage squashes the current branch (where it diverges from master) to a single commit on a new branch, under your name, and dated five minutes before the last commit.
Let's say that Mike Diligent has made three difficult commits on a new branch off of master, called frontend-refactor.
d5bef31 Mike Diligent Thu Feb 26 22:28:50 2015 -0800 Third dose of work.
af66c53 Mike Diligent Thu Feb 26 20:23:29 2015 -0800 Even more work.
b144683 Mike Diligent Thu Feb 26 19:13:10 2015 -0800 Lots of work.
git-upstage would then create a new branch, quick-frontend-refactor, containing one commit, dated five minutes before d5bef31, with a smarmy commit message as follows:
7e1ee98 Dishonest John Thu Feb 26 22:23:50 2015 -0800 Just a quick fix for the whole frontend-refactor issue.
-b, --branch BRANCHNAME
The branch that you wish to squash. Default: current branch.
-n, --newbranch NEWBRANCHNAME
The name of the new branch created by this. Default: quick-CB, where CB is the name of the branch you're on at the time the command is run.
-h, --honest
Don't backdate commit. (Still claims credit for it though.)
Copy git-upstage to any folder on your $PATH and make sure it's executable.
It can be invoked as git upstage like a git utility.