$ git clone -n https://src.fedoraproject.org/rpms/dnf5.git /var/lib/mock/f40-build-1915228-25086/root/chroot_tmpdir/scmroot/dnf5
Cloning into '/var/lib/mock/f40-build-1915228-25086/root/chroot_tmpdir/scmroot/dnf5'...
$ git fetch origin d3a91bb8a234e450713d8468c97bd81be5c14203:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dnf5
 * [new ref]         d3a91bb8a234e450713d8468c97bd81be5c14203 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3a91bb Fix a crash when sending e-mail notifications by the automatic plugin