Display the commit name instead of the relative name

Show branches and their commits.
More information: <https://git-scm.com/docs/git-show-branch>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

git show-branch --sha1-name --current {{current|branch_name|ref}}

click the source code to copy install git show-branch on any operating system with command-not-found.com