$ git clone -n https://src.fedoraproject.org/rpms/rust-below-model.git /var/lib/mock/f41-build-side-1-2999819-36291/root/chroot_tmpdir/scmroot/rust-below-model
Cloning into '/var/lib/mock/f41-build-side-1-2999819-36291/root/chroot_tmpdir/scmroot/rust-below-model'...
$ git fetch origin 08bb63076622d6fb39bf467e5fbcd9e89f09597d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-below-model
 * [new ref]         08bb63076622d6fb39bf467e5fbcd9e89f09597d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08bb630 Drop unused futures/compat dev-dependency feature