Did you know 'tig status' ?

It's like a GUI for the famous git add [-p].

Select files with the up/down-keys and hit

• u for staging/unstaging the whole file
• Enter for showing the diff of a file
  • j and k to navigate in the diff
  • u again to stage/unstage chunks
  • 1 to stage/unstage only lines
  • \ to split large chunks
• F5 to refresh the view