$ git clone -n https://src.fedoraproject.org/rpms/R-mvtnorm.git /var/lib/mock/f40-build-789177-135676/root/chroot_tmpdir/scmroot/R-mvtnorm
Cloning into '/var/lib/mock/f40-build-789177-135676/root/chroot_tmpdir/scmroot/R-mvtnorm'...
$ git fetch origin e6a76f7a0fcba39071959862c15d73d791a89423:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mvtnorm
 * [new ref]         e6a76f7a0fcba39071959862c15d73d791a89423 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6a76f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild