$ git clone -n https://src.fedoraproject.org/rpms/R-BufferedMatrix.git /var/lib/mock/f41-build-side-1-3142765-40009/root/chroot_tmpdir/scmroot/R-BufferedMatrix
Cloning into '/var/lib/mock/f41-build-side-1-3142765-40009/root/chroot_tmpdir/scmroot/R-BufferedMatrix'...
$ git fetch origin 648df7eed23f4f762c8b32f5d455048bbfe9f922:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-BufferedMatrix
 * [new ref]         648df7eed23f4f762c8b32f5d455048bbfe9f922 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 648df7e Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild