http://114.215.90.144/student_association/student.git
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to ‘
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http://114.215.90.144/student_association/student.git‘
hint: Updates were rejected because a pushed branch tip is behind its remote
hint: counterpart. Check out this branch and integrate the remote changes
hint: (e.g. ‘git pull ...‘) before pushing again.
hint: See the ‘Note about fast-forwards‘ in ‘git push --help‘ for details.