$ git clone -n https://src.fedoraproject.org/rpms/R-highr.git /var/lib/mock/f40-build-2032534-47705/root/chroot_tmpdir/scmroot/R-highr
Cloning into '/var/lib/mock/f40-build-2032534-47705/root/chroot_tmpdir/scmroot/R-highr'...
$ git fetch origin 4a3a83e5e8480e27479bda3e95856a6fd8615c0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-highr
 * [new ref]         4a3a83e5e8480e27479bda3e95856a6fd8615c0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a3a83e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild