git reset <pathspec> is the opposite of git add <pathspec>.
git reset [<commit>] resets the index but not the working tree (i.e., the changed files are preserved but not marked for commit) and reports what has not been updated.
The command git reset <pathspec> will change the index information but not make effect on working directory. It makes the index look like HEAD.
git reset -p is the opposite of git add -p. The reset command will accept a --patch option to unstage content on a hunk-by-hunk basis.
Use Reset To Squash Commits
The original commits:
Move the HEAD back to an older commit and keep the staged files.
Squash commits: git commit -m "add cultrue.txt and shun.txt".
The practice court: Learn Git
