$ git clone -n https://src.fedoraproject.org/rpms/imagefactory-plugins.git /var/lib/mock/f40-build-2004626-44974/root/chroot_tmpdir/scmroot/imagefactory-plugins
Cloning into '/var/lib/mock/f40-build-2004626-44974/root/chroot_tmpdir/scmroot/imagefactory-plugins'...
$ git fetch origin 9168dd48eb96aaba6ac55c466d242be35dde5bb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imagefactory-plugins
 * [new ref]         9168dd48eb96aaba6ac55c466d242be35dde5bb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9168dd4 Bump release number for last change