$ git clone -n https://src.fedoraproject.org/rpms/rpy.git /var/lib/mock/f40-build-2322017-58626/root/chroot_tmpdir/scmroot/rpy
Cloning into '/var/lib/mock/f40-build-2322017-58626/root/chroot_tmpdir/scmroot/rpy'...
$ git fetch origin 0898a29a0c80abcf91923e7e2b0622a1b4027d8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpy
 * [new ref]         0898a29a0c80abcf91923e7e2b0622a1b4027d8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0898a29 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild