revert a git add code example

Example 1: git undo add

// undo add for one file
git reset <file>

// undo add for all files
git reset

Example 2: revert git add

git reset <file> or git reset

Example 3: how to undo git add --all

git reset # Will unstage all the files you've added after your last commit

Example 4: how to revert a git revert

git revert <commitHashOfTheRevert> # locate the hash the revert was done 
                             #this will invert the changes made in that commit
                             #and preserve the git history