$ git clone -n https://src.fedoraproject.org/rpms/mozilla-filesystem.git /var/lib/mock/f31-build-111982-34238/root/chroot_tmpdir/scmroot/mozilla-filesystem
Cloning into '/var/lib/mock/f31-build-111982-34238/root/chroot_tmpdir/scmroot/mozilla-filesystem'...
$ git reset --hard ce83de1008b11d7e62a02bc7d8f9059c21806950
HEAD is now at ce83de1 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild