$ git clone -n https://src.fedoraproject.org/rpms/R-servr /var/lib/mock/f41-build-side-1-3149100-40244/root/chroot_tmpdir/scmroot/R-servr
Cloning into '/var/lib/mock/f41-build-side-1-3149100-40244/root/chroot_tmpdir/scmroot/R-servr'...
$ git fetch origin a13546e1d01d26dc0160c8c4e3f97f133d1859dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-servr
 * [new ref]         a13546e1d01d26dc0160c8c4e3f97f133d1859dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a13546e Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild