github - How do I undo a git reset --hard origin/bejing -

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i working on project. accidentally added file shouldn't have local git repo (very large copy of db). github rejected pushes github because file size large.

so needed remove commits , go was. did following, huge mistake. 

git reset --hard origin/bejing

i shouldn't have reset origin/bejing, rather reset bejing. or revert last commit of bejing.

now when try commit error.

    https://github.com/blah/myapi.git        40eeeb5..418805e  bejing -> bejing     git@heroku.com:blah-staging.git      ! [rejected]        bejing -> master (non-fast-forward)     error: failed push refs 'git@heroku.com:blah-staging.git'     prevent losing history, non-fast-forward updates rejected     merge remote changes before pushing again.  see 'note     fast-forwards' section of 'git push --help' details.

how fix this? mean want go had yesterday working. not quite sure git reset --hard origin/bejing did.

i not sure why error trying push master branch? master has not received updates in 2 years? why of sudden trying push bejing master (bejing -> master)?


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