$ git clone -n https://src.fedoraproject.org/rpms/R-expm.git /var/lib/mock/f40-build-789366-135728/root/chroot_tmpdir/scmroot/R-expm
Cloning into '/var/lib/mock/f40-build-789366-135728/root/chroot_tmpdir/scmroot/R-expm'...
$ git fetch origin 5cef0dd9b85ee46ac628978a864bbc7efb94f4d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-expm
 * [new ref]         5cef0dd9b85ee46ac628978a864bbc7efb94f4d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cef0dd Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild