$ git clone -n https://src.fedoraproject.org/rpms/plasma-milou.git /var/lib/mock/f40-build-2088828-50191/root/chroot_tmpdir/scmroot/plasma-milou
Cloning into '/var/lib/mock/f40-build-2088828-50191/root/chroot_tmpdir/scmroot/plasma-milou'...
$ git fetch origin ff21bfb7fc80945efb8d07a4da3b9f34e85bfe53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-milou
 * [new ref]         ff21bfb7fc80945efb8d07a4da3b9f34e85bfe53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff21bfb fix: upload missing sources