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git reset of a single file

Snippet Written with a loving hand by kitt some time around 11:16 on 18 December 2018

git reset will discard any local changes you have in the current branch you have checked out.

Sometimes, however, you want to reset a single file, not the whole branch. In this case, use checkout, but use the special "option" --, which is unix for "treat every argument after this point as a file name, no matter what it looks like."

# general case
git checkout HEAD -- [file]
 
# my specific case used ALL THE TIME
git checkout HEAD -- package-lock.json
Source: 
Hard reset of a single file
#git