The LArSoft code is available on cvmfs at /cvmfs/fermilab.opensciencegrid.org/products/larsoft/
This is a complete copy of /grid/fermiapp/products/larsoft
The cvmfs area is automatically updated nightly, but we also update manually when a new release is available.
Instructions for installing the OSG cvmfs client on Linux: https://twiki.grid.iu.edu/bin/view/Documentation/Release3/InstallCvmfs
MicroBooNE instructions for SLF and OSX