$ git clone -n https://src.fedoraproject.org/rpms/Box2D.git /var/lib/mock/f41-build-841669-161335/root/chroot_tmpdir/scmroot/Box2D
Cloning into '/var/lib/mock/f41-build-841669-161335/root/chroot_tmpdir/scmroot/Box2D'...
$ git reset --hard cfbd1bf49f2a5d67c50b6ac7c49570bf58a402c2
HEAD is now at cfbd1bf 2.4.2