message: Specify origin in rebase operation
diff: @@ -184,7 +184,7 @@ fn resolve_git_repo(repo: &str, path: &Path) -> Result<PathBuf> {
  /// before syncing a commit into the target branch.
  fn rebase_on_main(aws_sdk_path: &Path, branch: &str) -> Result<()> {
  let _ = run(&["git", "fetch", "origin", "main"], aws_sdk_path).context(here!())?;
  - if let Err(err) = run(&["git", "rebase", "main"], aws_sdk_path) {
  + if let Err(err) = run(&["git", "rebase", "origin/main"], aws_sdk_path) {
  bail!(
  "Failed to rebase `{0}` on top of `main`. This means there are conflicts \
  between `{0}` and `main` that need to be manually resolved. This should only \
  