$ git clone -n https://src.fedoraproject.org/rpms/R-mvtnorm.git /var/lib/mock/f39-build-1496075-34546/root/chroot_tmpdir/scmroot/R-mvtnorm
Cloning into '/var/lib/mock/f39-build-1496075-34546/root/chroot_tmpdir/scmroot/R-mvtnorm'...
$ git fetch origin eba4aef72b93c091835a1d732c25a14c36d1e58f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mvtnorm
 * [new ref]         eba4aef72b93c091835a1d732c25a14c36d1e58f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eba4aef Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild