git set head to specific commit code example

Example 1: set head of branch at specific commit

# You can make master point at a specific commit this way
git checkout master
git reset --hard <commit-hash>

# git reset --hard command will throw away any uncommitted changes 
# (i.e. those just in your working tree or the index).

Example 2: reset to commit

# rollback to commit state
git revert --no-commit 0766c053..HEAD
git commit