Update a forked repo with the upstream repo
$ mkdir my_own_project
$ cd my_own_project
$ git init
$ git remote add upstream [email protected]:ORIGINAL_REPO_OWNER/ORIGINAL_REPO_NAME.git
$ git fetch upstream
$ git merge upstream/master
# update:
$ git fetch upstream
$ git pull upstream/master
$ git merge upstream/master
When a string first appeared
git log -S "[email protected]" --source --all