$ git clone -n https://src.fedoraproject.org/rpms/zeek.git /var/lib/mock/f39-build-2561047-62096/root/chroot_tmpdir/scmroot/zeek
Cloning into '/var/lib/mock/f39-build-2561047-62096/root/chroot_tmpdir/scmroot/zeek'...
$ git fetch origin 1b214e6a84829181df12d8f54523a4b0a69bc660:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zeek
 * [new ref]         1b214e6a84829181df12d8f54523a4b0a69bc660 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b214e6 Added the README