$ git clone -n https://src.fedoraproject.org/rpms/libvirt-sandbox.git /var/lib/mock/f45-build-17217-497/root/chroot_tmpdir/scmroot/libvirt-sandbox
Cloning into '/var/lib/mock/f45-build-17217-497/root/chroot_tmpdir/scmroot/libvirt-sandbox'...
$ git fetch origin 4dc02dd3e7005909b124418b3f005ce013a5886d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvirt-sandbox
 * [new ref]         4dc02dd3e7005909b124418b3f005ce013a5886d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4dc02dd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild