$ git clone -n https://src.fedoraproject.org/rpms/gauche.git /var/lib/mock/f40-build-2279086-55310/root/chroot_tmpdir/scmroot/gauche
Cloning into '/var/lib/mock/f40-build-2279086-55310/root/chroot_tmpdir/scmroot/gauche'...
$ git fetch origin ba4bd75daeb9d2de931710bf26425f6bbbd6abf8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gauche
 * [new ref]         ba4bd75daeb9d2de931710bf26425f6bbbd6abf8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba4bd75 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild