$ git clone -n https://src.fedoraproject.org/rpms/dbus-parsec.git /var/lib/mock/f42-build-side-1-3586839-46926/root/chroot_tmpdir/scmroot/dbus-parsec
Cloning into '/var/lib/mock/f42-build-side-1-3586839-46926/root/chroot_tmpdir/scmroot/dbus-parsec'...
$ git fetch origin 19619b1cb3bb0aaad28ae123e9527058be104be9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dbus-parsec
 * [new ref]         19619b1cb3bb0aaad28ae123e9527058be104be9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19619b1 PARSEC is no longer being actively developed