Here is a pretty cool video of 18 months of Git commits using the Gource tool which is a software version control visualization tool.
Try to see it in full screen and at 1024p HD quality:
Here are the Gource settings used to create this video:
gource.exe -s 1 --file-idle-time 0 --key --title "TeamMentor" --font-size 30 -- hide dirnames --date-format "%d/%b/%y" --bloom-multiplier 0.5 --bloom-intensity 0.5 --f
Since the original video was 10 minutes, I used Camtasia Clip Speed feature to compress it to about 3 minutes (~180 sec)