move head back to previous commit code example

Example 1: git move branch to previous commit

git checkout 1258f0d0aae    #detach from master
git branch -f master HEAD   #exactly as above

#optionally reattach to master
git checkout master

Example 2: git move back one commit

# This will detach your HEAD, that is, leave you with no branch checked out:
git checkout 0d1d7fc32