Data Rates Rule...OK!

So git clone is busy "Receiving objects" but it's taking time...what data rate is underlying this operation?

Data rates are measured using a variety of standardised conventions.  

They are usually multiples of bits per second (bit/s) or bytes per second (B/s).  bit and Byte are ISQ symbols (International System of Quantities).

Residential Internet speeds are often measured in Megabits per second (Mbit/s - often abbreviated Mbps - as you will see in the Windows Network Speed Test application).  1 Mbps is 1000 kilo bits per second, or 1000 kbit/s or 1000 kbps).

There is also the Mibit/s convention - which stands for mebibits per second (or MiB/s).

This is 2^20 bits per second, or 1,048,576. Just over a million bits per second, basically.