$ git clone -n https://src.fedoraproject.org/rpms/vfrnav.git /var/lib/mock/f31-build-62502-29092/root/chroot_tmpdir/scmroot/vfrnav
Cloning into '/var/lib/mock/f31-build-62502-29092/root/chroot_tmpdir/scmroot/vfrnav'...
$ git reset --hard 51f170e1b0cae2f2b7ab0272dc15427c9cbbcd69
HEAD is now at 51f170e Rebuild (jsoncpp)