$ git clone -n https://src.fedoraproject.org/rpms/collectd.git /var/lib/mock/f41-build-side-1-2811086-32926/root/chroot_tmpdir/scmroot/collectd
Cloning into '/var/lib/mock/f41-build-side-1-2811086-32926/root/chroot_tmpdir/scmroot/collectd'...
$ git fetch origin 832c7ec75563412bf9a8efe3133e0e51948ae721:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/collectd
 * [new ref]         832c7ec75563412bf9a8efe3133e0e51948ae721 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 832c7ec Rebuild for new xen