$ git clone -n https://src.fedoraproject.org/rpms/rubygem-racc.git /var/lib/mock/f40-build-777940-129645/root/chroot_tmpdir/scmroot/rubygem-racc
Cloning into '/var/lib/mock/f40-build-777940-129645/root/chroot_tmpdir/scmroot/rubygem-racc'...
$ git fetch origin f9d133ede44292ef912f806ece69608fac3fe080:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-racc
 * [new ref]         f9d133ede44292ef912f806ece69608fac3fe080 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9d133e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild