The entire programming world is moving towards using GIT as it is becoming a de-facto. If you have few hours during the holidays and want to learn how to work with GIT (or how GIT works), do not miss this course from Udacity. The course instructor has done a good job of putting together a nice course with a lot of materials and exercises (you can complete the course in two days budgeting some breaks for reflection)
Udacity Course Link - Version Control with Git
Points to be noted:
Note 1: You will learn only git (not GIT Hub or something that uses git to host your code). Nevertheless, this should be the first step before embarking further. GIT Hub (or something similar) should be logical next step
Note 2: Highly recommend for students who are still in college (writing code is good thing, writing tests for the code is better thing, managing your code is the best thing)
Note 3: Very highly recommend for professionals who have not explored GIT yet (learn now or will be made to learn it in 2018).
Note 4: Many text editors (like Atom) and IDEs (like PyCharm) support GIT/GIT Hub (super easy)
Note 5 (good that you have read thus far): Refer https://git-scm.com and learn why you should be learning GIT if you are a developer
