$ git clone -n https://src.fedoraproject.org/rpms/libre.git /var/lib/mock/epel8-build-side-111120-59222322-6572056/root/chroot_tmpdir/scmroot/libre
Cloning into '/var/lib/mock/epel8-build-side-111120-59222322-6572056/root/chroot_tmpdir/scmroot/libre'...
$ git fetch origin 4fd3b2a9e7230879af8c4850acbcaed60f6ae454:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libre
 * [new ref]         4fd3b2a9e7230879af8c4850acbcaed60f6ae454 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4fd3b2a Merge remote branch 'origin/main' into epel8