$ git clone -n https://src.fedoraproject.org/rpms/osgi-compendium.git /var/lib/mock/f42-build-3367152-45050/root/chroot_tmpdir/scmroot/osgi-compendium
Cloning into '/var/lib/mock/f42-build-3367152-45050/root/chroot_tmpdir/scmroot/osgi-compendium'...
$ git fetch origin e442e698a119e19c5414a7437f4f56e657b542b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/osgi-compendium
 * [new ref]         e442e698a119e19c5414a7437f4f56e657b542b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e442e69 Remove javadoc subpackage