Railsチュートリアルbitbucketがうまく設定できない

Cloud9でrails チュートリアルを実施してるのですが
BitBucketがうまく設定できません。
レッスンを進むことができません。原因がわからないので教えてください。
チュートリアル

発生している問題・エラーメッセージ

unix
1ec2-user:~/environment/hello_app (master) $ git push -u origin --all
2To bitbucket.org:rails_lesson/hello_app.git
3 ! [rejected]        master -> master (non-fast-forward)
4error: failed to push some refs to 'git@bitbucket.org:rails_lesson/hello_app.git'
5hint: Updates were rejected because the tip of your current branch is behind
6hint: its remote counterpart. Integrate the remote changes (e.g.
7hint: 'git pull ...') before pushing again.
8hint: See the 'Note about fast-forwards' in 'git push --help' for details.

１．１１章まで手順通りに行いましたが、BitBucketでは反映が確認取れませんでした

試したこと

SSHポートが通るか確認

unix
1ec2-user:~/environment/hello_app (master) $ ssh -v -T hg@bitbucket.org
2OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
3debug1: Reading configuration data /home/ec2-user/.ssh/config
4debug1: /home/ec2-user/.ssh/config line 1: Applying options for bitbucket.org
5debug1: Reading configuration data /etc/ssh/ssh_config
6debug1: /etc/ssh/ssh_config line 58: Applying options for *
7debug1: Connecting to bitbucket.org [104.192.143.3] port 22.
8debug1: Connection established.
9debug1: identity file /home/ec2-user/.ssh/id_rsa type 1
10debug1: key_load_public: No such file or directory
11debug1: identity file /home/ec2-user/.ssh/id_rsa-cert type -1
12debug1: Enabling compatibility mode for protocol 2.0
13debug1: Local version string SSH-2.0-OpenSSH_7.4
14debug1: Remote protocol version 2.0, remote software version conker_1.1.1-306b384 app-131
15debug1: no match: conker_1.1.1-306b384 app-131
16debug1: Authenticating to bitbucket.org:22 as 'hg'
17debug1: SSH2_MSG_KEXINIT sent
18debug1: SSH2_MSG_KEXINIT received
19debug1: kex: algorithm: curve25519-sha256@libssh.org
20debug1: kex: host key algorithm: ssh-rsa
21debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
22debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
23debug1: kex: curve25519-sha256@libssh.org need=64 dh_need=64
24debug1: kex: curve25519-sha256@libssh.org need=64 dh_need=64
25debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
26debug1: Server host key: ssh-rsa SHA256:zzXQOXSRBEiUtuE8AikJYKwbHaxvSc0ojez9YXaGp1A
27debug1: Host 'bitbucket.org' is known and matches the RSA host key.
28debug1: Found key in /home/ec2-user/.ssh/known_hosts:1
29debug1: rekey after 134217728 blocks
30debug1: SSH2_MSG_NEWKEYS sent
31debug1: expecting SSH2_MSG_NEWKEYS
32debug1: SSH2_MSG_NEWKEYS received
33debug1: rekey after 134217728 blocks
34debug1: SSH2_MSG_SERVICE_ACCEPT received
35debug1: Authentications that can continue: publickey
36debug1: Next authentication method: publickey
37debug1: Offering RSA public key: /home/ec2-user/.ssh/id_rsa
38debug1: Server accepts key: pkalg ssh-rsa blen 279
39debug1: Authentication succeeded (publickey).
40Authenticated to bitbucket.org ([104.192.143.3]:22).
41debug1: channel 0: new [client-session]
42debug1: Entering interactive session.
43debug1: pledge: network
44debug1: Sending environment.
45debug1: Sending env LANG = en_US.UTF-8
46debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
47logged in as rails_lesson.
48
49You can use git or hg to connect to Bitbucket. Shell access is disabled.
50debug1: channel 0: free: client-session, nchannels 1
51Transferred: sent 2780, received 1840 bytes, in 0.0 seconds
52Bytes per second: sent 67420.1, received 44623.4
53debug1: Exit status 0