$ git clone -n https://src.fedoraproject.org/rpms/R-sp.git /var/lib/mock/f40-build-789221-135686/root/chroot_tmpdir/scmroot/R-sp
Cloning into '/var/lib/mock/f40-build-789221-135686/root/chroot_tmpdir/scmroot/R-sp'...
$ git fetch origin c172e71afabb03f71a5dc9688695283bdcbe6637:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-sp
 * [new ref]         c172e71afabb03f71a5dc9688695283bdcbe6637 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c172e71 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild