$ git clone -n https://src.fedoraproject.org/rpms/libguestfs.git /var/lib/mock/f40-build-775404-128068/root/chroot_tmpdir/scmroot/libguestfs
Cloning into '/var/lib/mock/f40-build-775404-128068/root/chroot_tmpdir/scmroot/libguestfs'...
$ git reset --hard 1b8e34eb452b50af9114c8380c4b28b523feeeb9
HEAD is now at 1b8e34e Remove yajl daemon dep and replace with jansson