GitHub is offering an online Git training course on August 16th, led by Matthew McCullough, to help participants quickly gain proficiency in Git from the comfort of their home or office. The course consists of six 50-minute sessions covering essential Git commands and costs $195 for a single student or $435 for three students, running from 11:00 am to 6:00 pm EST. Previous attendees have praised the course for its clarity, practical examples, and engaging instruction, with testimonials highlighting the improved understanding and appreciation of Git's capabilities, particularly the rebase feature, and commending McCullough's teaching style and course structure.