$ git clone -n https://src.fedoraproject.org/rpms/rust-cryptoki.git /var/lib/mock/f40-build-2631377-65771/root/chroot_tmpdir/scmroot/rust-cryptoki
Cloning into '/var/lib/mock/f40-build-2631377-65771/root/chroot_tmpdir/scmroot/rust-cryptoki'...
$ git fetch origin f1c0d9dd715bc50bb0359d69a2ca7e81706bf76d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cryptoki
 * [new ref]         f1c0d9dd715bc50bb0359d69a2ca7e81706bf76d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1c0d9d Update to 0.6.2