ssh_exchange_identification: Connection closed by remote host

I was pushing my app to production and
```
...
...
...
...
...
Done, example-web-production:v7 deployed to Workflow

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To learn more, use 'deis help' or visit https://deis.com/

fatal: The remote end hung up unexpectedly
fatal: The remote end hung up unexpectedly
```
Now I can't push more releases
```
ssh_exchange_identification: Connection closed by remote host
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
```