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Failed to connect to github.com port 443: Timed out

$ git push origin Cardy
error: src refspec Cardy does not match any.
error: failed to push some refs to ‘git@github.com:GoatYoung/DormManager.git’

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Failed to connect to github.com port 443: Timed out

Failed to connect to github.com port 443: Timed out

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