$ git clone -n https://src.fedoraproject.org/rpms/rust-cookie-factory.git /var/lib/mock/f40-build-2091822-50247/root/chroot_tmpdir/scmroot/rust-cookie-factory
Cloning into '/var/lib/mock/f40-build-2091822-50247/root/chroot_tmpdir/scmroot/rust-cookie-factory'...
$ git fetch origin 262b970d927de34fa19aa82f490e72d0d8bf93e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cookie-factory
 * [new ref]         262b970d927de34fa19aa82f490e72d0d8bf93e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 262b970 Regenerate with rust2rpm v24