$ git clone -n https://src.fedoraproject.org/rpms/vnstat.git /var/lib/mock/f40-build-791341-137475/root/chroot_tmpdir/scmroot/vnstat
Cloning into '/var/lib/mock/f40-build-791341-137475/root/chroot_tmpdir/scmroot/vnstat'...
$ git fetch origin d7ad7adebc9bf2af1ddc3183f5105f30db7c21bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vnstat
 * [new ref]         d7ad7adebc9bf2af1ddc3183f5105f30db7c21bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7ad7ad Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild