Wrong composer git repo URL

[congpeijun]

When run composer install

[RuntimeException]
Failed to clone https://github.com/tangler/dropbox.git via git, https protocols, aborting.

• git://github.com/tangler/dropbox.git
  fatal: remote error:
  Repository not found.
• https://github.com/tangler/dropbox.git
  fatal: Authentication failed

May set the wrong git repo url.
https://packagist.org/packages/tangler/dropbox