$ git clone -n https://src.fedoraproject.org/rpms/wpebackend-fdo.git /var/lib/mock/f41-build-side-1-2903082-34669/root/chroot_tmpdir/scmroot/wpebackend-fdo
Cloning into '/var/lib/mock/f41-build-side-1-2903082-34669/root/chroot_tmpdir/scmroot/wpebackend-fdo'...
$ git fetch origin ddf6676d5ef18b69490cdf4e505b8de8ed71c4e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wpebackend-fdo
 * [new ref]         ddf6676d5ef18b69490cdf4e505b8de8ed71c4e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddf6676 Really no longer used by any Fedora packages