$ git clone -n https://src.fedoraproject.org/rpms/thunderbird.git /var/lib/mock/f33-build-172930-44135/root/chroot_tmpdir/scmroot/thunderbird
Cloning into '/var/lib/mock/f33-build-172930-44135/root/chroot_tmpdir/scmroot/thunderbird'...
$ git reset --hard 830d4087d008e503905e352ac12d91ede3af9dd5
HEAD is now at 830d408 Update to 68.6 build2