$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-UUID.git /var/lib/mock/f40-build-2622610-64896/root/chroot_tmpdir/scmroot/perl-Data-UUID
Cloning into '/var/lib/mock/f40-build-2622610-64896/root/chroot_tmpdir/scmroot/perl-Data-UUID'...
$ git fetch origin 4868f56ea2960c38f89b14f2d6f5dc6594a5b894:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-UUID
 * [new ref]         4868f56ea2960c38f89b14f2d6f5dc6594a5b894 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4868f56 Update to 1.227