This is driving me crazy, as it's very easy on gitk (just
Short answer, no it can't do that (in v0.0.6).
gitg does not aim to be an advanced tool that allows access to every feature of Git through a graphical interface. However, it will try to incorporate common actions that might require multiple actions on the command line (like staging, unstaging, reverting, and committing)
Your best bet is the command line
git log <file> or