$ git clone -n https://src.fedoraproject.org/rpms/R-readr.git /var/lib/mock/f41-build-840038-160501/root/chroot_tmpdir/scmroot/R-readr
Cloning into '/var/lib/mock/f41-build-840038-160501/root/chroot_tmpdir/scmroot/R-readr'...
$ git fetch origin d8379ae8dffbc13a1d3e0021f177a6aaa0169633:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-readr
 * [new ref]         d8379ae8dffbc13a1d3e0021f177a6aaa0169633 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8379ae Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild