$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-net.git /var/lib/mock/f42-build-3402158-45132/root/chroot_tmpdir/scmroot/apache-commons-net
Cloning into '/var/lib/mock/f42-build-3402158-45132/root/chroot_tmpdir/scmroot/apache-commons-net'...
$ git fetch origin 62c910649344c4960d3511fae0e067c618ca835b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-net
 * [new ref]         62c910649344c4960d3511fae0e067c618ca835b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62c9106 Remove javadoc subpackage