$ git clone -n https://src.fedoraproject.org/rpms/imapfilter.git /var/lib/mock/f39-build-2186347-51343/root/chroot_tmpdir/scmroot/imapfilter
Cloning into '/var/lib/mock/f39-build-2186347-51343/root/chroot_tmpdir/scmroot/imapfilter'...
$ git fetch origin d784bde8d49152804207ccf8ac9263282e96129e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imapfilter
 * [new ref]         d784bde8d49152804207ccf8ac9263282e96129e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d784bde Add Packit config