$ git clone -n https://src.fedoraproject.org/rpms/openslide.git /var/lib/mock/f40-build-2229125-53130/root/chroot_tmpdir/scmroot/openslide
Cloning into '/var/lib/mock/f40-build-2229125-53130/root/chroot_tmpdir/scmroot/openslide'...
$ git fetch origin 9f7973cbfee80078561c412c690db594da6bdd6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openslide
 * [new ref]         9f7973cbfee80078561c412c690db594da6bdd6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f7973c New release