$ git clone -n https://src.fedoraproject.org/rpms/libvirt-sandbox.git /var/lib/mock/f40-build-785664-134041/root/chroot_tmpdir/scmroot/libvirt-sandbox
Cloning into '/var/lib/mock/f40-build-785664-134041/root/chroot_tmpdir/scmroot/libvirt-sandbox'...
$ git fetch origin 86884e42fdbdc49799c8bac2c69e142e80195a6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt-sandbox
 * [new ref]         86884e42fdbdc49799c8bac2c69e142e80195a6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86884e4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild