$ git clone -n https://src.fedoraproject.org/rpms/varnish.git /var/lib/mock/f39-build-1796033-41759/root/chroot_tmpdir/scmroot/varnish
Cloning into '/var/lib/mock/f39-build-1796033-41759/root/chroot_tmpdir/scmroot/varnish'...
$ git fetch origin 003072fcc1fc7da75a4948b51cd92a5ed9549a92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/varnish
 * [new ref]         003072fcc1fc7da75a4948b51cd92a5ed9549a92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 003072f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild