Karl Broman is a professor in the Department of Biostatistics and Medical Informatics at the University of Wisconsin-Madison. He’s an applied statistician working on problems in gentics.
He has participated as a student and as an instructor in Software Carpentry courses at UW-Madison, and he is currently teaching a one-credit course on Tools for Reproducible Research aimed at statistics graduate students (covering reproducible research concepts as well as R, knitr, Markdown, LaTeX, git, make).
What I found hardest about using Git the first time was… remembering to pull my collaborator’s changes before making my own changes. But my most vivid nightmares about Git concern detached HEAD states.