Re: abouy git reset command

amishera [off-list ref] writes:

I just want to make sure whether my understanding of that command is correct
or not. I have 3 basic requirements:

1. I have changed something after the commits and I think those are wrong.
So I want to undo all changes and the working directory should reflect last
commit:

git reset --hard HEAD

2. I have some changes in the index and I want undo them.

git reset HEAD

3. I just want to undo the last commit but not the working tree:

git reset HEAD^

If you mean by "undo last commit" reset HEAD pointer and index state,
then yes.
 

If they are correct commands please let me know. 

Besides in the man page for git reset it is mentioned:

git-reset - Reset current HEAD to the specified state

Which means it is supposed to work with commits. But why is the same
command work in case 2 and case 3 above?

Moreover, can any body tell me the use of

git reset --soft

The following language is confusing:

--soft

    Does not touch the index file nor the working tree at all, but
    requires them to be in a good order.

git-reset is all about setting the HEAD pointer, or to be more exact
to set current branch (current head) reference.  There are three
degrees of it:

 --soft changes only current HEAD
 --mixed (default) changes current HEAD and index file
 --hard changes current HEAD, index file and working tree

If you don't give <commit-ish>, git-reset defaults to HEAD,
i.e. current version.  Thus "git reset --soft" is no-op, it does do
nothing.

-- 
Jakub Narebski
Poland
ShadeHawk on #git