$ git clone -n https://src.fedoraproject.org/rpms/helm3.git /var/lib/mock/f45-build-13380-450/root/chroot_tmpdir/scmroot/helm3
Cloning into '/var/lib/mock/f45-build-13380-450/root/chroot_tmpdir/scmroot/helm3'...
$ git fetch origin d900e7faa5aece7836fad84e06daf19ca60c130e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/helm3
 * [new ref]         d900e7faa5aece7836fad84e06daf19ca60c130e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d900e7f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild