move branch to be from master code example

Example 1: copy branch to master

git checkout master.
git checkout branch_from_which_you_have_to_copy_the_files_to_master . (with period)
git add --all.
git push -u origin master.
git commit -m "copy from branch to master"

Example 2: how to move master changes to branch

git checkout -b newfeat master
git rebase --onto working-branch origin/master newfeat
git checkout master
git reset --hard origin/master

At this point you have:
*master pointing to the last pushed commit (origin/master)
*working-branch never changed
*a new newfeat branch that contains all the new commits and is ahead of working-branch.