git - This branch is 1 commit ahead of -

i have no idea doing wrong. trying sync fork upstream several commits behind. followed guide here:

https://help.github.com/articles/syncing-a-fork/

after steps described above , push them new commit appears:

merge remote-tracking branch 'upstream/master'

now fork 1 commit ahead of upstream. why , can do?

well makes sense. pushed own fork. original repo, has not yet pulled new commits, fork ahead of upstream/original repo. contribute original repo want make pull request.