To be able to have the work completed,
1. I can show a demo to you on how you could do it by yourself in downloading git source code, checkout, viewing history (through Git + through tools available)
2. Based on #1 - can prepare a document for you for your further reference (it will have all details needed & understood by you)
Pre-requisites that I would need are:
1. Access to your git OR a mechanism in which I can demo to you OR complete details from you on how you would like to have it explained to you to complete this work
2. Amount for this project paid before demo to make sure the work is completed
Please let me know if you have any feedback\inputs - we can also discuss it further