$ git clone -n https://src.fedoraproject.org/rpms/varnish-modules.git /var/lib/mock/f39-build-1508361-35368/root/chroot_tmpdir/scmroot/varnish-modules
Cloning into '/var/lib/mock/f39-build-1508361-35368/root/chroot_tmpdir/scmroot/varnish-modules'...
$ git fetch origin fb9883a65a554b886e6822fef9ac86b5a3fa145f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/varnish-modules
 * [new ref]         fb9883a65a554b886e6822fef9ac86b5a3fa145f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb9883a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild