$ git clone -n https://src.fedoraproject.org/rpms/R-biglm.git /var/lib/mock/f41-build-820870-152372/root/chroot_tmpdir/scmroot/R-biglm
Cloning into '/var/lib/mock/f41-build-820870-152372/root/chroot_tmpdir/scmroot/R-biglm'...
$ git fetch origin 21bb0edaf08a121cdb5bb9156f18db7fa9b4e5a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-biglm
 * [new ref]         21bb0edaf08a121cdb5bb9156f18db7fa9b4e5a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21bb0ed Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild