# NOTE: calling Commit.find_commit_range(user, nil, nil, 'rev') will produce
# an error message "fatal: bad object 'rev'" on stderr if 'rev' does not exist
# NOTE: calling Commit.find_commit_range(user, nil, nil, 'rev') will produce
# an error message "fatal: bad object 'rev'" on stderr if 'rev' does not exist