$ git clone -n https://src.fedoraproject.org/rpms/buku.git /var/lib/mock/f40-build-2094795-50367/root/chroot_tmpdir/scmroot/buku
Cloning into '/var/lib/mock/f40-build-2094795-50367/root/chroot_tmpdir/scmroot/buku'...
$ git fetch origin b5ebbdce5c79bc7a342a9b181a25dff086ae79ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buku
 * [new ref]         b5ebbdce5c79bc7a342a9b181a25dff086ae79ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5ebbdc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild