$ git clone -n https://src.fedoraproject.org/rpms/booksorg.git /var/lib/mock/f40-build-2274751-55026/root/chroot_tmpdir/scmroot/booksorg
Cloning into '/var/lib/mock/f40-build-2274751-55026/root/chroot_tmpdir/scmroot/booksorg'...
$ git fetch origin fe64a90f69f1ff07eb008617dac915181dd6cadd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/booksorg
 * [new ref]         fe64a90f69f1ff07eb008617dac915181dd6cadd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe64a90 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild