$ git clone -n https://src.fedoraproject.org/rpms/hd-idle.git /var/lib/mock/f45-build-13351-449/root/chroot_tmpdir/scmroot/hd-idle
Cloning into '/var/lib/mock/f45-build-13351-449/root/chroot_tmpdir/scmroot/hd-idle'...
$ git fetch origin 7218a5438333230e1c2fc6aae3b89f92c2ae65bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hd-idle
 * [new ref]         7218a5438333230e1c2fc6aae3b89f92c2ae65bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7218a54 drop ix86 support