ejemplo

Checksum error An error occurred while updating the package checksum.

pkg: Git checkout initial protocol failed;
 the given URL might not refer to a Git repository
  given URL: https://github.com/.git
  context...:
   /home/pkgserver/racket/collects/pkg/private/stage.rkt:824:33
   /home/pkgserver/racket/collects/net/git-checkout.rkt:384:0: parse-initial-refs
   /home/pkgserver/racket/collects/net/git-checkout.rkt:74:8
   /home/pkgserver/racket/collects/net/git-checkout.rkt:55:2: retry-loop