$ git clone -n https://src.fedoraproject.org/rpms/varnish-modules.git /var/lib/mock/f42-build-3531273-46322/root/chroot_tmpdir/scmroot/varnish-modules
Cloning into '/var/lib/mock/f42-build-3531273-46322/root/chroot_tmpdir/scmroot/varnish-modules'...
$ git fetch origin 81d36841801b4da1537d845fe4ac86097eb6e170:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/varnish-modules
 * [new ref]         81d36841801b4da1537d845fe4ac86097eb6e170 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81d3684 New upstream release for varnish-7.7.0