$ git clone -n https://src.fedoraproject.org/rpms/R-IRdisplay.git /var/lib/mock/f40-build-2071184-49322/root/chroot_tmpdir/scmroot/R-IRdisplay
Cloning into '/var/lib/mock/f40-build-2071184-49322/root/chroot_tmpdir/scmroot/R-IRdisplay'...
$ git fetch origin b45251ac2efc6a6b786079ddf1d578d55cba65be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-IRdisplay
 * [new ref]         b45251ac2efc6a6b786079ddf1d578d55cba65be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b45251a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild