I'm new to both git and GitHub. I managed to set up everything locally on my Mac, so that now I can push commits to GitHub via git (on the command line, not the Mac app).
When I push commits directly from the GitHub web interface (e.g. quickly fixing a typo), I have the chance to "comment" the commit, and GitHub gives me a commit title and a commit description. I find this very useful.
Still, when I git push from the local machine, git opens my default editor: so I write the commit comment, and then GitHub automatically divides it into title and "body". Is there a way to pretty comment commits from terminal too?
The answer is
There is also another straight and more clear way
git commit -m "Title" -m "Description ..........";
Use the git commit command without any flags. The configured editor will open (Vim in this case):
To start typing press the INSERT key on your keyboard, then in insert mode create a better commit with description how do you want. For example:
Once you have written all that you need, to returns to git, first you should exit insert mode, for that press ESC. Now close the Vim editor with save changes by typing on the keyboard :wq (w - write, q - quit):
and press ENTER.
On GitHub this commit will looks like this:
As a commit editor you can use VS Code:
git config --global core.editor "code --wait"
From VS Code docs website: VS Code as Git editor
Gif demonstration: 
git commit -a -m "Your commit message here"
will quickly commit all changes with the commit message. Git commit "title" and "description" (as you call them) are nothing more than just the first line, and the rest of the lines in the commit message, usually separated by a blank line, by convention. So using this command will just commit the "title" and no description.
If you want to commit a longer message, you can do that, but it depends on which shell you use.
In bash the quick way would be:
git commit -a -m $'Commit title\n\nRest of commit message...'
In case you want to improve the commit message with header and body after you created the commit, you can reword it. This approach is more useful because you know what the code does only after you wrote it.
git rebase -i origin/master
Then, your commits will appear:
pick e152ce2 Update framework
pick ffcf91e Some magic
pick fa672e1 Update comments
Select the commit you want to reword and save.
pick e152ce2 Update framework
reword ffcf91e Some magic
pick fa672e1 Update comments
Now, you have the opportunity to add header and body, where the first line will be the header.
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