git checkout -b new_branch old_branch
# initial state commit 2 (65bc341) O <-- master | (more commits) ... | commit 1 (125afe4) O <-- origin/master # run command git push origin 125afe4:refs/heads/master-copy # result commit 2 (65bc341) O <-- master | (more commits) ... | commit 1 (125afe4) O <-- origin/master origin/master-copy