$ git clone -n https://src.fedoraproject.org/rpms/python-cryptography.git /var/lib/mock/f41-build-846626-163152/root/chroot_tmpdir/scmroot/python-cryptography
Cloning into '/var/lib/mock/f41-build-846626-163152/root/chroot_tmpdir/scmroot/python-cryptography'...
$ git fetch origin fdf62093b4dec4102ef193c5fb08b8dd25e721a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cryptography
 * [new ref]         fdf62093b4dec4102ef193c5fb08b8dd25e721a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fdf6209 Flip off lock = true maturin config