how to move commit from new branch to an old branch 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 latest commit to new branch

git checkout existingbranch
git branch newBranch
git reset --hard HEAD~2 # go back 2 commits on existingBranch