$ git clone -n https://src.fedoraproject.org/rpms/rrdtool.git /var/lib/mock/f41-build-775123-13519/root/chroot_tmpdir/scmroot/rrdtool
Cloning into '/var/lib/mock/f41-build-775123-13519/root/chroot_tmpdir/scmroot/rrdtool'...
$ git fetch origin 5647b5a0dc6139e28aff15f11c12fd3a80afa807:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rrdtool
 * [new ref]         5647b5a0dc6139e28aff15f11c12fd3a80afa807 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5647b5a Eliminate use of obsolete %patchN syntax (#2283636)