$ git clone -n https://src.fedoraproject.org/rpms/R-magrittr.git /var/lib/mock/f40-build-789485-135730/root/chroot_tmpdir/scmroot/R-magrittr
Cloning into '/var/lib/mock/f40-build-789485-135730/root/chroot_tmpdir/scmroot/R-magrittr'...
$ git fetch origin c8e74fc994ec2be94fd7bdec4acb49a3a60e3328:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-magrittr
 * [new ref]         c8e74fc994ec2be94fd7bdec4acb49a3a60e3328 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8e74fc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild