You should probably avoid `--color`, as it turns on color unconditionally, even if output is going to a file. In older versions of Git the %C color placeholders were unconditional anyway. In modern Git, they respect the normal auto-coloring settings.
You can also drop `--abbrev-commit`, since `%h` abbreviates by default (use `%H` if you want the full hash).
You can also drop `--abbrev-commit`, since `%h` abbreviates by default (use `%H` if you want the full hash).