marlin/buildroot/share/git/mfinit

#!/usr/bin/env bash
#
# mfinit
#
# Create the upstream remote for a forked repository
#

[[ $# == 0 ]] || { echo "usage: `basename $0`" 1>&2 ; exit 1; }

[[ -z $(git branch 2>/dev/null | grep ^* | sed 's/\* //g') ]] && { echo "No git repository here!" 1>&2 ; exit 1; }

REPO=$(git remote get-url origin 2>/dev/null | sed -E 's/.*\/(.*)\.git/\1/')
[[ -z $REPO ]] && { echo "`basename $0`: No 'origin' remote found." 1>&2 ; exit 1; }

echo "Adding 'upstream' remote for convenience."
git remote add upstream "git@github.com:MarlinFirmware/$REPO.git"
git fetch upstream