$ git clone -n https://src.fedoraproject.org/rpms/rust-cryptoki.git /var/lib/mock/f40-build-2360589-60338/root/chroot_tmpdir/scmroot/rust-cryptoki
Cloning into '/var/lib/mock/f40-build-2360589-60338/root/chroot_tmpdir/scmroot/rust-cryptoki'...
$ git fetch origin e3e99d62e3c9fbc12482c856def4244cb7ebceba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cryptoki
 * [new ref]         e3e99d62e3c9fbc12482c856def4244cb7ebceba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3e99d6 Update to 0.6.1