$ git log
commit a867b4af366350be2e7c21b8de9cc6504678a61b`
Author: Me <me@me.com>
Date:   Thu Nov 4 18:59:41 2010 -0400

blah blah blah...

commit 25eee4caef46ae64aa08e8ab3f988bc917ee1ce4
Author: Me <me@me.com>
Date:   Thu Nov 4 05:13:39 2010 -0400

more blah blah blah...

commit 0766c053c0ea2035e90f504928f8df3c9363b8bd
Author: Me <me@me.com>
Date:   Thu Nov 4 00:55:06 2010 -0400

And yet more blah blah...

commit 0d1d7fc32e5a947fbd92ee598033d85bfc445a50
Author: Me <me@me.com>
Date:   Wed Nov 3 23:56:08 2010 -0400

Yep, more blah blah.

git checkout -b old-state 0d1d7fc32

git reset --hard HEAD

git revert --no-commit 0766c053..HEAD
git commit

git reset --hard <commidId> && git clean -f

git add . && git checkout master -f

git add . && git reset --hard HEAD

git reset --soft HEAD~1

git reset --hard [previous Commit SHA id here]
git push origin [branch Name] -f

git reset --soft [previous Commit SHA id here]

git checkout <commit_id>
git checkout -b <new branch> <commit_id>
git checkout HEAD~X // x is the number of commits t go back

# Checkout a given commit.
# Doing so will result in a `detached HEAD` which mean that the `HEAD`
# is not pointing to the latest so you will need to checkout branch
# in order to be able to update the code.
git checkout <commit-id>

# create a new branch forked to the given commit
git checkout -b <branch name>

git reflog
git checkout HEAD@{...}

fe60adeba6436ed8f4cc5f5c0b20df7ac9d93219
0c27ecfdab3cbb08a448659aa61764ad80533a1b
f85007f35a23a7f29fa14b3b47c8b2ef3803d542
e9ec660ba9c06317888f901e3a5ad833d4963283
6a80768d44ccc2107ce410c4e28c7147b382cd8f
9cf6c21f5adfac3732c76c1194bbe6a330fb83e3
fff2336bf8690fbfb2b4890a96549dc58bf548a5
1f7082f3f52880cb49bc37c40531fc478823b4f5
e9b317d36a9d1db88bd34831a32de327244df36a
f6ea0e7208cf22fba17952fb162a01afb26de806
137a681351037a2204f088a8d8f0db6e1f9179ca

git rm -r .
git checkout <commit> .
git commit

git reset HEAD~1

# Revert local master branch to November 3rd commit ID
git reset --hard 0d1d7fc32e5a947fbd92ee598033d85bfc445a50

# Revert remote master branch to November 3rd commit ID
git push -f origin 0d1d7fc32e5a947fbd92ee598033d85bfc445a50:master

git back

# Remove the latest three commits
git back 3

git push -f ...

git show HEAD
git show HEAD~1
git show HEAD~2

git reset --hard HEAD~1

git reset <SHA>

git reset --hard <SHA>

git add -A .
git reset --hard HEAD

git reset --hard origin/master

git stash
git stash clear

git reset --hard HEAD

git revert <commit1> <commit2>

git reset --hard [first-4-letters&numbers-of-commit's-SHA]

git branch -f <<branchname>> 0d1d7fc32e5a947fbd92ee598033d85bfc445a50

git reflog

git reset HEAD@{12} --hard

git pull --all
git reset --hard HEAD~1
git push --force

git push origin :develop (note the colon)

git reset --hard EFGHIJK

git push origin develop