This is a Git plugin
for windows install msys2 package
pacman -S mingw-w64-x86_64-libgit2
put/clone RetroGit to RetroShare/plugins/ recommend
cd ${YOUR_DIR}/RetroShare/plugins/RetroGit/
mkdir build
cd build
qmake ..
make
Copy your RetroGit.dll to "Data/extensions6" (Windows) Then restart your RetroShare. You'll see a git logo in you main tool-bar.