$ git clone -n https://src.fedoraproject.org/rpms/jack-rack.git /var/lib/mock/f31-build-54208-27966/root/chroot_tmpdir/scmroot/jack-rack
Cloning into '/var/lib/mock/f31-build-54208-27966/root/chroot_tmpdir/scmroot/jack-rack'...
$ git reset --hard 5b52998bef8db05b7dd2501c46b54fc90e780c72
HEAD is now at 5b52998 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild