$ git clone -n https://src.fedoraproject.org/rpms/plexus-utils.git /var/lib/mock/f40-build-2078200-49593/root/chroot_tmpdir/scmroot/plexus-utils
Cloning into '/var/lib/mock/f40-build-2078200-49593/root/chroot_tmpdir/scmroot/plexus-utils'...
$ git fetch origin 10939d9dbda3a5b639cf0e7a54568227706473a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-utils
 * [new ref]         10939d9dbda3a5b639cf0e7a54568227706473a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10939d9 Update javapackages test plan to f40