gnb
$ gnb
Created and switched to branch: user/251215
$ gnb ABC-123
Created and switched to branch: user/ABC-123
$ gnb fix login bug
Created and switched to branch: user/fix-login-bug
# existing branch? auto-suffix _2, _3...
$ gnb ABC-123
Created and switched to branch: user/ABC-123_2
curl -LsSf https://gnb.bfoos.net/install.sh | bash

or: cargo install --git https://github.com/BrianSigafoos/git-new-branch