$ git clone -n https://src.fedoraproject.org/rpms/gr-osmosdr.git /var/lib/mock/f42-build-3419544-45162/root/chroot_tmpdir/scmroot/gr-osmosdr
Cloning into '/var/lib/mock/f42-build-3419544-45162/root/chroot_tmpdir/scmroot/gr-osmosdr'...
$ git fetch origin d2e915eafd2afd80db145e022537ec2f68fa471b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gr-osmosdr
 * [new ref]         d2e915eafd2afd80db145e022537ec2f68fa471b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2e915e Rebuilt for new gnuradio