Fix git repo initialization in presubmit (#822)

cloudbuild/presubmit.sh

@@ -27,11 +27,13 @@ configure_gcloud_ssh_key() {
 # Fetches master branch from GitHub and "resets" local changes to be relative to it,
 # so we can diff what changed relatively to master branch.
 initialize_git_repo() {
+  rm -fr .git
   git init
+
   git config user.email "[email protected]"
   git config user.name "ia-tests"
 
-  git remote add origin "https://github.com/GoogleCloudPlatform/dataproc-initialization-actions.git"
+  git remote add origin "https://github.com/GoogleCloudDataproc/initialization-actions.git"
   git fetch origin master
   # Fetch all PRs to get history for PRs created from forked repos
   git fetch origin +refs/pull/*/merge:refs/remotes/origin/pr/*