git-helper.txt

first of all HEAD is a pointer, out working things are always in a pointer named HEAD.
we can change HEAD position using checkout
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showing all branch log--
  git log --all --oneline
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showing current branch log 
git log --oneline
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rollback to any previous commit (no new commit will be executed, this for the time when we just need to go to a previous version and it wont
                                 matter if the commits after the given "commit_id" is deleted)
git reset <commit_id>
git push --force
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now if we want to go to a previous version but we don't want to delete the commits that are committed after the given "commit_id" then
we should use revoke
a good tutorial link
https://www.freecodecamp.org/news/git-revert-commit-how-to-undo-the-last-commit/
https://stackoverflow.com/questions/4114095/how-do-i-revert-a-git-repository-to-a-previous-commit

git revert --no-commit <commit_id> -m 1(m is needed if there is a merge commit in between head and 
git --continue
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git branch -av => shows all the local branches and the local version of the corresponding remote branches
git pull  => pulls all the remote branch updated version to local origin/<branch_name> 
git merge origin/<branch_name> => merge current HEAD position with the given <branch_name>
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removing a file
[a link](https://stackoverflow.com/questions/2047465/how-can-i-delete-a-file-from-a-git-repository/2047477)
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