$ git clone -n https://src.fedoraproject.org/rpms/idevicerestore.git /var/lib/mock/f41-build-side-1-2805932-32866/root/chroot_tmpdir/scmroot/idevicerestore
Cloning into '/var/lib/mock/f41-build-side-1-2805932-32866/root/chroot_tmpdir/scmroot/idevicerestore'...
$ git fetch origin 640f45706ab3a4f0d6fb1ee34eb6b287ccd74b77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/idevicerestore
 * [new ref]         640f45706ab3a4f0d6fb1ee34eb6b287ccd74b77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 640f457 Update to git snapshot 511261e