Repository: http://repo.msys2.org/msys/x86_64/
Download (version 3.1.3-1): http://repo.msys2.org/msys/x86_64/rsync-3.1.3-1-x86_64.pkg.tar.xz
Note: You'll need to be admin to copy this file to the Program Files directory of Gitbash
set -x
RSYNC_BIN="http://repo.msys2.org/msys/x86_64/rsync-3.1.3-1-x86_64.pkg.tar.xz"
RSYNC_PATH="usr/bin/rsync.exe"
GITBASH_BIN="/c/Program\ Files/Git/usr/bin/"
mkdir rsync
(cd rsync && curl $RSYNC_BIN | tar xJ - $RSYNC_PATH && cp $RSYNC_PATH $OUTDIR)
rm -vf rsync
Copied from here for posterity: https://blog.tiger-workshop.com/add-rsync-to-git-bash-for-windows/