$ git clone -n https://src.fedoraproject.org/rpms/libvirt-sandbox.git /var/lib/mock/f39-build-1506631-35203/root/chroot_tmpdir/scmroot/libvirt-sandbox
Cloning into '/var/lib/mock/f39-build-1506631-35203/root/chroot_tmpdir/scmroot/libvirt-sandbox'...
$ git fetch origin 7a218301c7659390f709909b6e29812df2e2f49e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt-sandbox
 * [new ref]         7a218301c7659390f709909b6e29812df2e2f49e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a21830 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild