$ git clone -n https://src.fedoraproject.org/rpms/firefox.git /var/lib/mock/f33-build-381749-62008/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/f33-build-381749-62008/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard 0bca9e286bc33c6e56a9b968f8c4b4ec7b75067d
HEAD is now at 0bca9e2 spec tweak