$ git clone -n https://src.fedoraproject.org/rpms/gnome-boxes.git /var/lib/mock/f42-build-3275473-41321/root/chroot_tmpdir/scmroot/gnome-boxes
Cloning into '/var/lib/mock/f42-build-3275473-41321/root/chroot_tmpdir/scmroot/gnome-boxes'...
$ git fetch origin 9ea814b9a7b70ce7ec62e29cbe70f371ea55829a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-boxes
 * [new ref]         9ea814b9a7b70ce7ec62e29cbe70f371ea55829a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ea814b Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild