Got here through Google with no answer to be found.
After looking around some more and getting a better understanding of how Atom/Juno key bindings works, I found what I needed. I’ll leave it here for people in the future.
https://github.com/akonwi/git-plus/issues/705
The detailed instructions are:
ctrl+shift+p will drop down Atom’s command palette. From there, search for Keymap and select the option Application: Open Your Keymap.
With your keymap config file open you can follow the instructions outlined in the Issue above and simply paste the following to the end of the file.
'atom-workspace':
'ctrl-)': 'window:toggle-bottom-dock'
Saving the file will cause Atom/Juno to instantly reload your bindings and you’re good to go.