$ git clone -n https://src.fedoraproject.org/rpms/mozjs68.git /var/lib/mock/f33-build-225393-48457/root/chroot_tmpdir/scmroot/mozjs68
Cloning into '/var/lib/mock/f33-build-225393-48457/root/chroot_tmpdir/scmroot/mozjs68'...
$ git reset --hard 5654b3a47a2ae7bf98eaef8eaf1f457d4ac380e7
HEAD is now at 5654b3a Release 68.8.0