$ git clone -n https://src.fedoraproject.org/rpms/nomacs.git /var/lib/mock/f40-build-2140933-50850/root/chroot_tmpdir/scmroot/nomacs
Cloning into '/var/lib/mock/f40-build-2140933-50850/root/chroot_tmpdir/scmroot/nomacs'...
$ git fetch origin affe4510f32bd41573c7479e0ae08f3e8bd69827:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nomacs
 * [new ref]         affe4510f32bd41573c7479e0ae08f3e8bd69827 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at affe451 Rebuild for opencv 4.8.0