$ git clone -n https://src.fedoraproject.org/rpms/R-flexiblas.git /var/lib/mock/f38-build-side-42-init-devel-755379-27676/root/chroot_tmpdir/scmroot/R-flexiblas
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-755379-27676/root/chroot_tmpdir/scmroot/R-flexiblas'...
$ git fetch origin 3b2045f86b5004d2cf01f09b3f5833ce9a59c6fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-flexiblas
 * [new ref]         3b2045f86b5004d2cf01f09b3f5833ce9a59c6fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b2045f Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild